Remember guys, this is in the "Off Topics" forum - so naturally a lot more is allowed in this area of the board.
Have a look at this Wikipedia definition of an Internet Troll:
http://en.wikipedia.org/wiki/Internet_troll
There are various ways to deal with Trolls, but one way is to simply not respond to comments they may make. They then get frustrated and quit posting, or increase posting frequency and acidity so much they get kicked from a forum.
Ron