There's also a lot of fake profiles on Friendster. Someone popular in the Broadway community pmed me on Friendster once and then befriended me. I thought he was fake for a bit until sources told me otherwise.
On the same account, I've been pmed by some fake profiles as well. Most of the time they're easy to detect, other times you're not so sure.
"You! You are the worst thing to happen to musical theatre since Andrew Lloyd Webber! And you, well, I just plain don't like you."
~Stewart Gilligan Griffin