In graphic and web design , a dark pattern is “a user interface That has-been Carefully crafted to trick users into doing things, Such As buying insurance With Their purchase or signing up for recurring bills.”    The neologism dark pattern was coined by Harry Brignull in August 2010 with the registration of darkpatterns.org , a “pattern library with the specific goal of naming and shaming deceptive user interfaces.”  
Bait-and-switch patterns advertise a free (or greatly reduced ) product or service which is wholly unavailable or stocked in small quantities. After it is apparent the product is not longer available, they are exposed to other products similar to the one advertised.  
A forced disclosure pattern offer low-cost or free services goal que la require user Such sensitive information you divulge credit card information, personal addresses, and phone numbers. Some companies will sell this information to advertisers.  
A roach motel or a net trammel  is a situation that is easy or straightforward to get into, but difficult to get out of. Examples include businesses that require subscribers to print and mail their opt-out or cancellation request.  
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- Jump up^ Brignull, Harry (Nov 1, 2011). “Dark Patterns: Deception vs. Honesty in UI Design” . A List Apart . Retrieved 29 May 2017 .
- Jump up^ Grauer, Yael (28 July 2016). “Dark Patterns Are Designed to Trick You, and They’re All Over the Web” . Ars Technica . Retrieved 29 May 2017 .
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- ^ Jump up to:a b c Brignull, Harry. “Types of Dark Patterns” . Dark Patterns . Retrieved 29 May 2017 .
- Jump up^ Brignull, Harry (29 August 2013). “Dark patterns: Inside the interfaces designed to trick you” . The Verge . Retrieved 29 May 2017 .