Hacking Reputation in MySpace and Facebook
Check out [this
post](http://www.schneier.com/blog/archives/2006/12/hacking_reputat.html) from Schneier on Security:
"I'll be the first to admit it: I know next to nothing about MySpace or Facebook. I do know that they're social networking sites, and that -- at least to some extent -- your reputation is based on who are your "friends" and what they say about you.
Which means that this follows, like day follows night. "Fake Your Space" is a site where you can "hire" fake friends to leave their pictures and personalized comments on your page." (from: Hacking Reputation in MySpace and Facebook)
Read the whole thing: Hacking
Reputation in MySpace and Facebook