I suppose I'd like some insight on this, since TWHL is filled with mature peeps unlike your average forum.
You know how people on the internet troll others because they find it funny and enjoy the extreme reactions and whatnot? What if... there is a reason behind this? Perhaps trolls are like infectious zombies. You know, if one bites you and you become one yourself. It will be spreading unchecked.
Now I know what you're thinking. This isn't true because TWHL is mature and even though people here prolly got trolled before, they don't become trolls. Or at least on this site. But I think this all relates back to the human desire for vengeance.
Now I know we here are all grown up and mature, but no doubt you know some people are still young and proactive. I think that if these kids who are still young got BADLY trolled, they will have some kind of rage that builds up inside them because revenge cannot be done on the internet, especially when young kids are no match against some older troll. SO THEN they have this unfelt rage inside them, having to vent against somebody for being PWNED but nowhere to express it. So they becomes trolls themselves. Pass on the pain they felt to others, and continue this vicious and self-sustaining cycle of pain and suffering.
This is all theory, of course. I have no idea if this is true. Prolly not. Feel free to add your opinions below.
P.S. Come to think of it, this sounds alot like bullying