facebook and IP address?

[ashley]

i just asked this and received a response...but it won't let me post a question back, so i have to "re-ask"....
i received a message from someone on facebook. and i answered back. i don't know him though. now he says he will get my IP address and find out where i am.
Madman responded and said yes, he will know what town. but i'm in a small town so that scares me.
seriously Madman? how can he get my IP address from a message or from viewing my profile?
please tell me how.
and....if he truly can...what if i de-activate my facebook account for awhile...can he still get my IP address?