I read their terms and conditions. After that, I deleted my account.
(I work at Facebook, but I'm mostly just asking for my own interest.)
But don't tell me, now everything is much better. That is what all software people say about the last release, isn't it? Just get it right from the beginning.
It was a good decision, though. Everybody should check t&c before signing something. That sheds a clear light on who is really evil and who is not.