Come to the dark side...

...of user experience. is a UX pattern library curated by Harry Brignull dedicated to user interfaces that have been designed to trick users.

Learn about patterns such as Bait and Switch, Privacy Zuckering, and my personal favorite Roach Motel aka Hotel California.

We've all experienced sites with these incredibly annoying, manipulative, and potentially dangerous UX patterns. Let's take up the call, and shed some light on them. Do you know a site that uses one of these anti-usability design practices? Submit it to

Here is a presentation Harry gave at UX Brighton: