Yahoo Mail: adverts presented as unread emails.

“Dark #UX pattern spotted on @yahoomail - ads are styled to look like unread emails, making it too easy for users to accidentally click on the ad and drive revenue to Yahoo and their advertisers.”

Disclaimer: examples in the Hall of Shame are generally drawn from public submissions and cited sources; they have not been independently verified and may contain inaccuracies. They are presented as illustrations of design patterns, not findings of fact, unlawful conduct, or intent.