Dark Patterns: User Interfaces Designed to Trick People
I found this site from the blog posting Anti-Patterns and Dark Patterns at Endeca.
The term dark patterns is used to refer to patterns in user interfaces that by design try to serve their own purposes and not those of users.
Such as making canceling a subscription very difficult.
There are a host of other examples at this site.
One legitimate use of such examples would be as contrast to your topic map interface, which is designed to assist users.
Or in the preparation of such a demonstration to alert you that your interface isn’t as helpful as you thought.