Civil Law And Platform Shadow Banning Legal Accountability Claims In Europe

1. Introduction

Platform shadow banning generally describes a situation in which a platform does not formally suspend or delete a user's account, but allegedly reduces the visibility, reach, recommendation, search ranking, or distribution of the user's content.

Examples include:

posts becoming invisible to non-followers;

content being excluded from recommendation feeds;

hashtags or search results no longer displaying the content;

reduced algorithmic distribution;

advertising or monetisation being restricted;

account-level “reach limits”;

content being demoted without an obvious notification;

an algorithm silently reducing a creator's audience.

The important legal problem is that shadow banning is usually less visible than an ordinary suspension.

A platform may say:

“The account is active and the post has not been removed.”

The user may respond:

“The platform has technically left the account active but has deliberately prevented the content from reaching its normal audience.”

European law increasingly recognises this distinction. Most importantly, Article 17 of the Digital Services Act (DSA) expressly includes “demoting” content within restrictions for which hosting providers must provide a clear and specific statement of reasons. (EUR-Lex)

However, there is not yet a mature European body of civil judgments specifically using the legal term “shadow banning.” The relevant law must therefore be constructed from DSA transparency and redress rules, freedom of expression jurisprudence, intermediary-liability cases, data protection, competition law, and national contract/delict law.

2. Meaning of Shadow Banning

A useful distinction is:

Ordinary removal

Content → deleted

Suspension

Account → disabled

Demotion

Content → remains online but receives less visibility

Shadow banning

Account/content → appears operational, but algorithmically receives substantially reduced distribution without an obvious or adequately explained restriction

Therefore:

Shadow banning is essentially an alleged hidden visibility restriction.

The legal question is not merely whether content remains technically accessible.

The more important question is:

Has the platform imposed a material restriction on visibility, distribution or access, and if so, was that restriction lawful, transparent and properly reviewable?

3. Main European Legal Framework

The principal sources are:

Digital Services Act (DSA), Regulation (EU) 2022/2065

EU Charter of Fundamental Rights

European Convention on Human Rights

GDPR

Platform-to-Business Regulation (P2B Regulation)

EU competition law

National contract law

National tort/delict law

Consumer-protection law

National constitutional/free-expression law

The applicable regime depends heavily upon whether the claimant is:

an ordinary consumer/user;

professional creator;

business user;

advertiser;

publisher;

political actor;

public-interest organisation.

4. The Most Important DSA Rule: Article 17

Article 17 DSA is particularly significant.

Where a hosting provider restricts content because it is illegal or incompatible with its terms and conditions, the provider must give the affected recipient a clear and specific statement of reasons.

The provision expressly covers:

removal;

disabling access;

demotion of content;

restriction of payments;

suspension/termination of services;

suspension/termination of accounts. (EUR-Lex)

This is highly relevant to shadow banning.

Example

Suppose:

A creator's posts normally reach 500,000 people.

After an unexplained algorithmic action:

The posts reach only 2,000 people.

The account remains active.

The creator argues:

“This is a hidden demotion.”

If the reduction constitutes a restriction covered by Article 17, the platform's obligations concerning reasons and redress become relevant.

5. Article 20 DSA — Internal Complaint Mechanism

The DSA also requires online platforms to provide an internal complaint-handling system for recipients affected by certain restrictions.

This is particularly important because shadow banning is often difficult to detect.

The legal sequence can therefore be:

Visibility reduction

↓

Reason statement

↓

Internal complaint

↓

Platform review

↓

Out-of-court dispute settlement

↓

Judicial/regulatory remedy where appropriate

The European Commission's description of the DSA framework confirms the relationship between Article 17 statements of reasons, Article 20 internal complaints, Article 21 out-of-court dispute settlement and Article 53 complaints to the Digital Services Coordinator. (EUR-Lex)

6. Article 27 DSA — Recommender-System Transparency

Another important provision concerns recommender systems.

Online platforms using recommender systems must explain in their terms and conditions the main parameters used by their recommender systems and the options available to recipients to modify or influence those parameters. (EUR-Lex)

This is particularly relevant because shadow banning frequently occurs through:

ranking;

recommendation;

feed distribution;

search visibility;

algorithmic prioritisation.

Important limitation

Transparency about recommender-system parameters does not mean that the platform must reveal its entire source code or every individual ranking decision.

The legal obligation is primarily one of meaningful information and transparency.

7. Case 1 — Glawischnig-Piesczek v Facebook Ireland, C-18/18

This is one of the most important CJEU cases for platform accountability.

The case arose after defamatory content was posted on Facebook concerning Austrian politician Eva Glawischnig-Piesczek.

The CJEU considered the liability of hosting providers and whether courts could order Facebook to remove identical or, in certain circumstances, equivalent unlawful content. (Infocuria)

Principle

The CJEU held that EU law did not preclude injunctions requiring a hosting provider to remove:

identical unlawful content;

certain equivalent unlawful content;

and such injunctions could, within the relevant legal framework, have worldwide effect. (Curia)

Shadow-banning relevance

The case establishes that platforms are not legally untouchable simply because content is processed automatically.

Courts can impose obligations concerning the platform's handling of user-generated content.

But there is an equally important limitation:

The case concerned unlawful content and removal obligations, not general algorithmic visibility.

Therefore it should not be cited as establishing a general right to unrestricted platform reach.

Exam point

Glawischnig-Piesczek = platform algorithms and hosting systems can be subject to judicially enforceable content-management obligations.

8. Case 2 — Delfi AS v Estonia

Delfi AS v Estonia is a leading ECtHR authority on intermediary responsibility for user-generated online content.

The case concerned an Estonian news portal that was held liable under domestic law for clearly unlawful comments posted by readers. The ECtHR's Grand Chamber found no violation of Article 10 in the circumstances of that case. (HUDOC)

The Court emphasised the need to balance:

freedom of expression;

protection of reputation;

duties and responsibilities of Internet intermediaries.

Shadow-banning relevance

The case demonstrates that platforms can have legal responsibilities regarding content moderation.

But there is a major distinction:

Delfi = responsibility for clearly unlawful user comments

whereas

Shadow banning = alleged reduction in lawful content visibility.

A platform cannot automatically rely on Delfi as justification for suppressing lawful speech.

Exam point

Delfi = intermediary responsibility can exist, but the nature of the content and platform are critical.

9. Case 3 — Magyar Tartalomszolgáltatók Egyesülete and Index.hu Zrt v Hungary

This ECtHR case is particularly important because it demonstrates the other side of the moderation problem.

Two Hungarian Internet-content providers were held liable domestically for vulgar/offensive comments posted by users.

The ECtHR found a violation of Article 10. The Court considered, among other factors, the nature of the comments, the context, the measures taken by the operators and the chilling effect that excessive liability could have on Internet expression. (HUDOC)

Principle

Not every offensive or undesirable online statement justifies imposing extensive liability on a platform.

Shadow-banning relevance

Suppose a platform uses extremely broad moderation standards:

“Any criticism of the platform may be demoted.”

A claimant could argue that such a system creates an excessive chilling effect.

The MTE case therefore supports the proposition that platform regulation must be balanced against freedom of expression.

Exam point

MTE and Index.hu = excessive platform responsibility can produce a chilling effect on online expression.

10. Case 4 — Magyar Jeti Zrt v Hungary

This ECtHR case concerned liability associated with hyperlinking to third-party content.

The Court found that imposing objective liability on the applicant company without sufficiently relevant and sufficient reasons created a disproportionate restriction on freedom of expression. The Court specifically noted the potential chilling effect on Internet information flows. (HUDOC)

Shadow-banning relevance

The case is important because it recognises the special characteristics of online communication.

A platform's:

linking;

ranking;

recommendation;

distribution

may influence the flow of information.

Therefore, a legal system that imposes excessive liability on the intermediary may indirectly encourage excessive suppression of online material.

Exam point

Magyar Jeti = liability affecting online information distribution must account for the chilling effect on Internet communication.

11. Case 5 — L'Oréal v eBay, C-324/09

The CJEU considered liability and injunctions involving an online marketplace.

The Court held that national courts must be able, in appropriate circumstances, to order marketplace operators to take measures to stop and prevent infringements committed through their services. (Infocuria)

Principle

An online intermediary can have legally enforceable obligations concerning activities carried out through its platform.

Shadow-banning relevance

This provides an important structural principle:

Platform neutrality is not absolute.

Where lawfully established rights are infringed, the platform may be required to take action.

But the converse is also important:

A platform's ability to moderate or manage content does not automatically mean that every visibility decision is legally justified.

The legality depends upon:

the relevant statutory duty;

contractual terms;

fundamental rights;

proportionality;

applicable procedural safeguards.

Exam point

L'Oréal v eBay = online platforms may be subject to injunctions concerning platform activity.

12. Case 6 — Google and Alphabet v Commission, T-612/17 / C-48/22 P

The Google Shopping litigation is extremely useful for understanding algorithmic visibility.

The European Commission found that Google favoured its own comparison-shopping service by displaying its results more prominently than competing comparison-shopping services. The General Court largely upheld the Commission's findings in 2021. (Curia)

The CJEU later considered Google's appeal in C-48/22 P, concerning the abuse-of-dominance analysis and effects of Google's preferential display of its own specialised results. (Infocuria)

Why this matters for shadow banning

This is not a shadow-banning case.

But it demonstrates an important legal proposition:

Algorithmic positioning and visibility can have legally significant competitive effects.

If a dominant platform systematically reduces the visibility of competitors or particular categories of business users, competition law may become relevant.

Possible Article 102 TFEU issue

Potential elements include:

dominant position;

discriminatory treatment;

self-preferencing;

exclusionary effects;

foreclosure;

competitive harm.

Exam point

Google Shopping = algorithmic ranking/visibility can become legally significant where dominance and competitive effects are established.

13. Case 7 — Meta Platforms v Bundeskartellamt, C-252/21

In Meta Platforms v Bundeskartellamt, the CJEU examined the relationship between:

GDPR;

online social-networking;

competition law;

processing of personal data.

The case concerned Meta's combination of data from Facebook with data collected from other Meta services and third-party websites/apps. The CJEU held, among other things, that a competition authority can examine GDPR compliance in the context of a competition investigation, while respecting the institutional role of data-protection authorities. (Infocuria)

Shadow-banning relevance

Algorithms may use personal data to determine:

ranking;

recommendation;

audience selection;

content distribution;

advertising visibility.

Therefore, an alleged hidden visibility restriction may potentially involve data-protection law if personal data are unlawfully processed or used.

Important limitation

C-252/21 does not establish that algorithmic ranking itself violates GDPR.

The claimant must identify a specific GDPR issue.

Exam point

Meta C-252/21 = competition, GDPR and social-network algorithmic/data practices can intersect.

14. Case 8 — Pihl v Sweden

In Pihl v Sweden, the ECtHR examined whether an individual should bear responsibility for a defamatory comment posted by a third party on a small blog.

The Court's approach reinforced the importance of considering:

nature of the speech;

context;

consequences;

measures taken by the intermediary;

interests of the affected person.

Shadow-banning relevance

The case supports a contextual approach rather than treating every online publication identically.

Thus:

A small private forum and a massive algorithmically curated social network may raise different legal considerations.

This is important when assessing whether a platform's moderation system is proportionate.

15. Shadow Banning and Freedom of Expression

Article 10 ECHR protects:

the right to hold opinions;

the right to receive information;

the right to impart information and ideas.

But Article 10 is principally concerned with State interference.

This creates an important distinction.

Government censorship

State → platform/user

Article 10 can directly constrain State action.

Private platform moderation

Platform → user

Article 10 does not automatically create a direct contractual right to be promoted by a private platform.

However, Article 10 can influence:

interpretation of domestic law;

proportionality analysis;

State positive obligations;

judicial balancing;

legislation governing platforms.

The ECtHR's platform cases demonstrate this indirect but important constitutional dimension. (HUDOC)

16. Is There a “Right to Reach”?

Generally, one should not assume that European law gives every user a right to receive a particular algorithmic level of reach.

A social-media platform may ordinarily have legitimate reasons to:

rank content;

recommend some material over other material;

apply spam controls;

prevent manipulation;

reduce harmful content;

enforce community standards;

combat coordinated inauthentic behaviour.

The legal issue becomes much stronger where the claimant can establish:

A specific legal right + a specific platform restriction + unlawful reason/procedure + identifiable harm.

17. DSA Makes Hidden Demotion More Legally Significant

The DSA changes the analysis because demotion is expressly mentioned in Article 17.

The statutory text includes “demoting” content among restrictions requiring a statement of reasons where Article 17 applies. (EUR-Lex)

Therefore, a platform cannot necessarily avoid all transparency obligations merely by saying:

“We didn't delete your post.”

A visibility restriction can itself be legally relevant.

18. But Algorithmic Ranking Is Not Automatically Shadow Banning

This distinction is essential.

Normal ranking

Platform determines:

Post A should appear before Post B.

This is normal platform functionality.

Demotion

Platform deliberately reduces distribution under a moderation or policy decision.

Shadow banning

Alleged hidden or insufficiently disclosed reduction of visibility.

Therefore:

Low reach alone does not prove shadow banning.

A claimant would need evidence showing that the reduction resulted from a platform decision or algorithmic intervention rather than:

ordinary ranking;

lower user engagement;

changing audience behaviour;

recommendation changes;

technical problems;

competition;

content quality signals.

19. Proof of Shadow Banning

This is likely to be the hardest part of litigation.

The claimant may need to establish:

1. Baseline

What was the normal reach before the alleged restriction?

2. Change

When did the visibility reduction begin?

3. Platform action

Was there an account-level or content-level intervention?

4. Algorithmic effect

Did the system reduce recommendation/search/feed distribution?

5. Reason

Why was the restriction imposed?

6. Causation

Did the restriction actually cause the economic or reputational loss?

20. Evidence

Useful evidence includes:

screenshots;

platform notifications;

moderation notices;

account-status records;

recommendation analytics;

reach statistics;

impressions;

follower/non-follower distribution;

search visibility;

hashtag visibility;

advertising records;

algorithmic ranking information;

internal complaint records;

DSA statement of reasons;

platform terms;

communications with the platform;

expert algorithmic analysis.

Formula

B–C–A–R–D

Baseline → Change → Algorithmic action → Reason → Damage

21. Data Protection Dimension

Shadow banning may involve personal-data processing.

For example, a platform may use:

behavioural history;

location data;

browsing patterns;

engagement data;

inferred interests;

profiling;

account history.

GDPR issues may arise concerning:

lawful basis;

transparency;

profiling;

automated decision-making;

data accuracy;

access rights;

objection;

information about processing.

The Meta C-252/21 judgment demonstrates that data-protection law can intersect with the operation of a dominant social network. (Infocuria)

22. Automated Decision-Making

A particularly difficult issue is GDPR Article 22.

If an algorithm makes a decision that:

is solely automated;

involves personal data processing;

produces legal effects or similarly significant effects;

the Article 22 framework may become relevant.

However:

Not every reduction in social-media reach is an Article 22 decision.

The claimant must demonstrate the statutory conditions.

This distinction prevents an overly broad argument that every recommendation algorithm is prohibited automated decision-making.

23. Commercial Shadow Banning

Shadow banning can also affect businesses.

Example:

An online marketplace seller normally receives 100,000 product impressions per month. Its listings are suddenly algorithmically buried, causing a large decline in sales.

The seller could potentially examine:

P2B Regulation;

DSA;

contract;

competition law;

national civil law.

For business users, the P2B Regulation is particularly important because it regulates transparency of ranking parameters and complaint mechanisms for online intermediation services.

24. Ranking Transparency for Business Users

The P2B Regulation is particularly relevant where:

a marketplace;

app store;

search engine;

platform

affects a business user's visibility.

Business users should be given information concerning the main parameters determining ranking and the reasons for their relative importance.

This creates a significant distinction:

Consumer social-media user

Primarily DSA/consumer/data/fundamental-rights framework.

Business seller on a platform

P2B + DSA + contract + competition law may operate together.

25. Competition-Law Accountability

Shadow banning may become a competition issue where the platform is dominant.

Potential theory:

Dominant platform + discriminatory algorithmic visibility + exclusionary effect = possible Article 102 issue.

But dominance alone is insufficient.

A claimant would normally need to establish:

relevant market;

dominance;

abusive conduct;

anticompetitive effect or capability;

causation;

potentially measurable harm.

Google Shopping demonstrates that preferential algorithmic presentation can be scrutinised under Article 102 TFEU. (Curia)

26. Contractual Liability

A creator or business may also argue that the platform breached its contract.

Possible contractual promises include:

account availability;

content distribution;

advertising delivery;

monetisation;

ranking transparency;

specified service levels;

compliance with platform rules.

However, many platform agreements contain broad clauses stating that:

“We may modify ranking and recommendation systems at any time.”

The court would then examine:

governing law;

incorporation;

interpretation;

good faith;

mandatory statutory rules;

unfair-terms legislation;

whether the clause permits arbitrary conduct.

27. Good Faith

National civil-law systems may impose contractual good-faith duties.

A platform's conduct could potentially become problematic where it:

deliberately misrepresents its moderation practices;

promises neutral distribution but secretly discriminates;

applies rules selectively;

uses undisclosed criteria contrary to contractual commitments.

But:

Good faith does not automatically create a general obligation for a platform to maximise a user's reach.

28. Damages

Potential losses include:

A. Lost advertising revenue

Creator's reduced reach causes lower advertising income.

B. Lost sales

Business seller's products become less visible.

C. Wasted advertising expenditure

The claimant paid for advertising but algorithmically suppressed the underlying content.

D. Lost contracts

Reduced platform visibility causes commercial opportunities to disappear.

E. Reputational damage

Potentially recoverable under applicable national law where adequately established.

F. Non-pecuniary harm

Available only where the applicable legal system recognises it.

29. Causation

A claimant cannot simply say:

“My views dropped by 80%, therefore the platform owes me damages.”

The claimant must distinguish the platform's alleged intervention from:

seasonal changes;

audience changes;

competitor activity;

changes in content quality;

algorithm updates affecting everyone;

lower engagement;

changes in consumer demand.

Causation formula

Shadow Action → Reduced Visibility → Reduced Audience → Economic Loss

Each link must be supported by evidence.

30. Regulatory Liability vs Civil Liability

This distinction is very important.

Regulatory claim

User says:

“The platform violated Article 17 DSA.”

Possible consequences:

regulatory investigation;

compliance order;

administrative sanctions;

complaint to Digital Services Coordinator.

Civil claim

User says:

“The platform's unlawful conduct caused me €100,000 of damage.”

The claimant additionally needs:

legally recognised cause of action;

damage;

causation;

applicable national remedy.

The DSA does contain a damages provision in Article 54 for recipients who suffer damage caused by an infringement of the Regulation, with national law governing the applicable conditions and procedures. (EUR-Lex)

31. Remedies

Potential remedies include:

Procedural remedies

statement of reasons;

internal complaint;

out-of-court dispute settlement;

regulatory complaint.

Judicial remedies

injunction;

restoration of visibility where legally justified;

removal of unlawful restrictions;

declaration of rights;

damages.

Data-protection remedies

access;

correction;

objection;

restriction;

erasure where applicable;

complaint to data-protection authority.

Competition remedies

investigation;

infringement decision;

behavioural remedies;

damages in national courts where the legal conditions are satisfied.

32. Proportionality

A central question is whether the platform's restriction is proportionate.

Consider:

Legitimate objective

Prevent spam or illegal content.

↓

Suitable measure

Reduce distribution.

↓

Necessary measure

Could a less restrictive measure work?

↓

Balancing

How seriously does the measure affect the user's legitimate expression or business?

The ECtHR's Internet jurisprudence repeatedly stresses balancing competing rights and avoiding disproportionate interference with online expression. (HUDOC)

33. Distinguishing Legitimate Moderation From Shadow Banning

This table does not mean that every opaque ranking decision is unlawful. The legality depends on the particular statutory and contractual framework.

34. Important Case-Law Comparison

35. Six Cases to Memorise

For a short examination answer, remember:

1. Glawischnig-Piesczek, C-18/18

Platform can be subjected to judicial orders concerning unlawful online content. (Infocuria)

2. Delfi AS v Estonia

Platform/intermediary responsibility can arise for clearly unlawful user content. (HUDOC)

3. MTE & Index.hu v Hungary

Excessive liability for user comments can interfere disproportionately with online expression. (HUDOC)

4. Magyar Jeti Zrt v Hungary

Online liability must account for the chilling effect on Internet information flows. (HUDOC)

5. Google Shopping, T-612/17 / C-48/22 P

Algorithmic preferential visibility can raise Article 102 TFEU concerns. (Curia)

6. Meta Platforms v Bundeskartellamt, C-252/21

Data processing by a dominant social network can intersect with GDPR and competition law. (Infocuria)

36. A Strong Legal Test for Shadow-Banning Claims

Use:

V–A–R–P–C–D–R

V — Visibility

Was the content actually subjected to reduced visibility?

A — Algorithmic/Platform Action

Was the reduction caused by the platform?

R — Reason

Was there a legitimate and disclosed reason?

P — Procedure

Was the user given required reasons and complaint mechanisms?

C — Causation

Did the restriction cause the alleged harm?

D — Damage

Is the damage legally recoverable and proved?

R — Remedy

Is restoration, compensation or regulatory relief available?

37. Special Problem: Proving a Hidden Algorithm

Courts may face an information asymmetry:

Platform knows:

ranking algorithm;

internal moderation signals;

account risk score;

recommendation settings;

enforcement history.

User knows:

reach dropped;

engagement dropped;

content disappeared from recommendations.

This creates a serious evidentiary problem.

The DSA's transparency and statement-of-reasons requirements are therefore particularly important because they can reduce the information gap between the platform and affected recipient. Article 17 expressly addresses visibility restrictions including demotion. (EUR-Lex)

38. Can a Court Order the Platform to Restore Reach?

Not automatically.

A court may have authority to order:

removal of unlawful content;

cessation of unlawful conduct;

reconsideration of an unlawful decision;

compliance with statutory obligations;

damages.

But:

A court is not ordinarily required to guarantee that an algorithm will give the user a particular number of views.

A technically enforceable remedy might instead require the platform to:

reconsider the restriction;

give reasons;

follow its contractual rules;

conduct the required complaint process;

remove an unlawful restriction.

39. Platform Shadow Banning and Political Content

Political content requires particular care.

A platform may have legitimate content-moderation rules, but restrictions affecting political expression can raise heightened freedom-of-expression questions.

The ECtHR has repeatedly treated political expression as an important component of Article 10 protection.

Nevertheless, the legal analysis remains fact-specific and does not establish an unlimited right to platform amplification.

The key distinction is:

Freedom to express an opinion ≠ automatic entitlement to algorithmic promotion.

40. Commercial Shadow-Banning Claims

For a business, the strongest case may arise where:

it has a contractual relationship with the platform;

ranking/visibility terms are contractually regulated;

the platform applies those terms inconsistently;

a specific demotion occurs;

the platform fails to provide required reasons;

the claimant proves economic loss.

For example:

Marketplace seller → algorithmic demotion → 70% reduction in impressions → 50% fall in sales.

The claimant would still have to establish that the demotion, rather than market factors, caused the sales decline.

41. Major Defences for Platforms

Platforms may argue:

1. No restriction

The content remained available.

2. Normal ranking

The reduction resulted from ordinary algorithmic ranking.

3. Legitimate moderation

The content violated platform rules.

4. Anti-spam measure

The account displayed automated or suspicious behaviour.

5. Algorithmic neutrality

The same ranking criteria applied to comparable users.

6. No causation

The claimant's loss resulted from other factors.

7. Contractual discretion

Terms permitted ranking changes.

8. No recoverable damage

The claimed loss is speculative.

9. DSA does not create the asserted right

The claimant must identify the specific DSA obligation allegedly breached.

42. Future Development of European Law

Shadow-banning disputes are likely to become increasingly important because modern platforms determine visibility through:

recommender systems;

AI moderation;

automated risk scoring;

behavioural profiling;

content classification;

trust-and-safety systems;

personalised ranking.

The DSA already provides a legal vocabulary for these issues by expressly referring to demotion, recommender-system parameters, reasons for restrictions and complaint mechanisms. (EUR-Lex)

The next major development is likely to be the growth of litigation concerning how those statutory transparency obligations interact with national civil damages law.

43. Conclusion

Platform shadow banning legal accountability in Europe is an emerging area rather than a fully settled civil-liability doctrine.

The most important development is the Digital Services Act, because Article 17 expressly recognises demotion of content as a form of restriction for which affected recipients can be entitled to a clear and specific statement of reasons. Articles 20 and 21 add internal complaint and out-of-court redress mechanisms. (EUR-Lex)

The case law supplies the surrounding principles:

Glawischnig-Piesczek — platforms can be subjected to judicial content-management obligations;

Delfi — intermediaries may have responsibilities for clearly unlawful content;

MTE & Index.hu — excessive platform liability can threaten online expression;

Magyar Jeti — online restrictions must account for chilling effects;

L'Oréal v eBay — online intermediaries can be subject to judicial injunctions;

Google Shopping — algorithmic visibility can have competition-law consequences;

Meta v Bundeskartellamt — social-network algorithms, data protection and competition law can intersect. (Infocuria)

Final examination formula

Shadow-Banning Claim =

Visibility Reduction + Platform Action + Legal/Contractual Duty + Required Transparency + Causation + Proven Damage + Available Remedy

And the most important caution is:

A reduction in reach by itself does not prove unlawful shadow banning. The claimant must establish that a legally relevant platform restriction occurred and that the applicable DSA, contractual, data-protection, competition or national civil-law requirements were breached.