Yahoo was catalogued by the UXP2 Lab over the process of unsubscribing from its newsletter. According to the entry, confusing options are presented when a user tries to unsubscribe.
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Yahoo: Confusing Unsubscribe.
“Yahoo uses confusing options when trying to unsubscribe from their newsletter.”
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.