Phrase o' the day: "roach motel"

A "roach motel" is a web site design for a sign-up based service where it's super easy to sign up, but very hard to delete your account. (The reference comes from this 1981 TV ad.)

The phrase is one of many concepts behind "park patterns," interface designs that intentionally manipulate visitors into doing things in the companys' interests, but against the users'.