I can understand why a troll would hang out on a board like this. My guess is that they aim to drive good people away. It started to happen on the Whitney Board a couple of years ago before it got a diligent moderator. People get tired of being abused every time they post and some eventually stay away. It also alters the course of discussions and dilutes the flow of useful and interesting information. I think it's an example of a pathetic little person enjoying a sense of power that is otherwise unavailable.
What is nice is that these message boards are well-maintained. Trolls do not last long. I have actually changed my own thinking on the subject. instead of avoiding getting drawn into conversations with them, go ahead and engage. It exposes them all the faster and soon they are gone.

