Individual HTML example · Interface interference

Consent purposes fragmented into dozens of toggles

A fictional signup consent screen lists forty overlapping purposes across five nested panels, with duplicated labels and no summary of the resulting state.

Choice or information overloadSignup consent choicesSignup

This is an original fictional comparison. It depicts no real business and is not a regulator finding, statutory category or legal safe harbour.

Signup consent choicesSignup

Consent purposes fragmented into dozens of toggles

A fictional signup consent screen lists forty overlapping purposes across five nested panels, with duplicated labels and no summary of the resulting state.

Potentially problematicManage 40 data choices

Manage 40 data choices. Duplicated labels and nested toggles prevent a coherent view of what remains enabled.. Not selected: Audience measurement. Not selected: Content measurement. Not selected: Product development. Not selected: Partner insights. Not selected: Personalised offers. Open purpose 17

Neutral alternativeChoose optional purposes

Choose optional purposes. Six distinct groups provide summaries, supporting detail and a visible final state.. Not selected: Service analytics. Not selected: Personalisation. Not selected: Partner sharing. Review six purpose groups. Purpose and refusal effect, expanded: The form explains why “Review six purpose groups” is requested and what happens if it is not used.

Why the first version can mislead: The presentation changes what the user can notice or predict at the signup decision. The problematic state shows: “Duplicated labels and nested toggles prevent a coherent view of what remains enabled.” Its influence should be tested by comparing the consequence and usability of “Open purpose 17” with “Review six purpose groups”. The apparent detail may overwhelm rather than enable a meaningful purpose-by-purpose choice.

What a fairer design does: Use understandable purpose groups, progressive detail and a persistent summary of the choices made.

Show annotated differences (4)
Potentially problematic version
  • Duplicated labels and nested toggles prevent a coherent view of what remains enabled.Why this state matters: The presentation changes what the user can notice or predict at the signup decision. The problematic state shows: “Duplicated labels and nested toggles prevent a coherent view of what remains enabled.” Its influence should be tested by comparing the consequence and usability of “Open purpose 17” with “Review six purpose groups”. The apparent detail may overwhelm rather than enable a meaningful purpose-by-purpose choice.
  • Open purpose 17Review prompt: Do “Open purpose 17” and “Review six purpose groups” receive comparable prominence and explain their consequences before activation?
Neutral alternative
  • Six distinct groups provide summaries, supporting detail and a visible final state.Fairer design: Use understandable purpose groups, progressive detail and a persistent summary of the choices made.
  • Purpose and refusal effect, expanded: The form explains why “Review six purpose groups” is requested and what happens if it is not used.Review prompt: Which fields or permissions are required, what happens on refusal, and does the resulting state support this criterion: “Key differences cannot be reasonably compared”?
Review questions (3)
  • Do “Open purpose 17” and “Review six purpose groups” receive comparable prominence and explain their consequences before activation?
  • Which fields or permissions are required, what happens on refusal, and does the resulting state support this criterion: “Key differences cannot be reasonably compared”?
  • What neutral rendering or comprehension result would falsify the classification, particularly in light of “mere long page without a decision link”?
Side-by-side signup consent choices interface showing “Manage 40 data choices” and the clearer alternative “Choose optional purposes”.Provenance: Original hypothetical signup consent choices example created for this library; no real business, product or interface is depicted.

Complete practice context

How this example relates to Choice or information overload

The volume or organisation of options or information makes meaningful comparison impractical and channels users toward a default or business-favoured path. This is a design and research taxonomy for learning and evidence review, not a statutory offence label or an automatic finding that an interface is unlawful.

The full guide explains inclusion and exclusion criteria, potential harms, fairer design, evidence questions and separate Australian legal information layers. The example page isolates one scenario so it can be shared and discussed without reproducing the complete library on one page.

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Sources and provenance for this example

Evidence base

Sources

  1. An Ontology of Dark Patterns KnowledgeGray et al.; ACM CHI 2024 · Secondary · checked 2026-09-14 · DOI 10.1145/3613904.3642436; arXiv:2309.09640
  2. Behavioural study on unfair commercial practices in the digital environmentEuropean Commission, Directorate-General for Justice and Consumers · Secondary · checked 2026-09-14 · DOI 10.2838/859030; ISBN 978-92-76-52316-1
  3. Competition and Consumer Amendment (Unfair Trading Practices) Act 2026Federal Register of Legislation · Primary · checked 2026-09-14 · C2026A00064