MessenJah: Is he a troll or not?

Troll? does this mean he lives under a bridge and eats billy goats? I have absolutley no idea what a troll is, could someone explain please? Sorry if I am being thick.

http://en.wikipedia.org/wiki/Troll_(Internet)

An Internet troll, or simply troll in Internet slang, is someone who posts controversial, inflammatory, irrelevant or off-topic messages in an online community, such as an online discussion forum or chat room, with the intention of provoking other users into an emotional response[1] or to generally disrupt normal on-topic discussion.[2]