Should I block this guy on twitter?

[Unicorn_Wizard]

This guy who is probably 7 years older than me followed me on twitter a while ago. I followed him back to be nice. Afterwards he direct messaged me (privately messaged) and we had a little conversation. He was very nice though. Just now he asked to be my friend on Facebook. It kind of creeped me out because he would have had to do some research to figure out what my Facebook name is. In your opinion, do you think he's just being nice or should I block him? Thanks for your advice!

[Jonathan]

He might have found out your Facebook name if you linked your Facebook account with your Twitter account. I'm not sure if people can look up these things, but that's a possibility.

[Lauraa]

Personally id get rid of him and block him