If you befriended someone online, say from this FB social networking site, and had the chance to meet them in real life... would you do it?

Would you become their friends [going out together, sharing intimate thoughts...], if they seemed nice enough.

But if you later realized they're a bunch of cookoos and crooks, out to scam/hurt others... would you stay friend with them? Would you just walk away, or expose them @#@#?