E-stat gave a very good definition. A troll is someone looking to start a fight and then disappears. For example, if you come to an audio board and start screaming to the rafters that Bose is the greatest thing since sliced bread, red flags start flying over your avatar. This is not to say all Bose fanboys are trolls, that is merely an example of a volatile topic.

SVI is not a troll. Misguided perhaps, naive for sure, but not a troll. I'm of the belief that he genuinely enjoys audio (and dinosaurs) and simply doesn't know better. He's actually pretty entertaining if you just take him for what he is.

Melvin might be a troll, the jury is still out. He certainly enjoys making inflamatory remarks and spouts misinformation like Ol' Faithful, but he also hangs around long enough for responses. There is a dialogue, per se. I simply ignore him.

If you hang around long enough, I think you'll find most of the members at AR are good folk just trying to help. A little color and heated bantering is inevitable and somewhat necessary. It keeps the place lively!