
Jurica summarized very well what the worst heavy troll is in the senge generally ackowledged.
More details to be found here :
http://curezone.com/forums/troll.asp
http://en.wikipedia.org/wiki/Internet_troll
Now, not every mutliple pers. is a troll, nor then jokers and tricksters. The state of mind of the reader of the post often give a colour the post does not have. For example, if you, yourself, are just come back from a bad experience, you may be more sensitive right now. I had such "glasses" few months ago.
Although Trolls are considered the worst nuisance in a forum, I consider that cliques as you have described them is equally responsible for the health (or not) of the live of a forum. (In fact, as I have already "say" hre I consider trolls and clisques like a manifestation of an ego problem more than a problem in itself.) Like in real life, as long as a clique is the authority it tends to consider that what is good for them is Good. Well I stop there, I'm short in time, and I do not want to be TOO long. Just to conclude that the webmaster of the site/forum is making all the difference for the health of democracy on a board, if he/she is democratic or not, because in the last run the WM has the real power over its creation.
End of the lecture

And again, welcome aboard.
