I FB but I am very very wary. My friends list is short. I can think of only two individuals on it I have not met personally in real life.

FB is what you make of it. I just live it carefully.

Trust your gut. Remember you are the one with the power though to pick and choose those you interact with and at what level.

My recommendation? Stick to your guns. Don't give out personal information to these people. Keep communication to the matter and topic at hand.