Let me offer the "4 fun ppl theory", which explains the widespread horrible behavior and the recent research:
Those we consider trolls are people with honest intention to positively socialize, but their extremely low social skills cause them to post hurtful or annoying things instead.
My formula is "basement dweller + audience + lack of clear rules or authority = total f..wad".
In some ways it is both a narrowing and a broadening of the GIFT formula.
In my opinion, this is the most interesting thing that Gevlon has ever written. It's unfortunate that it's posted to a small MMO blog. It deserves a wider audience than will read it.
Heh, the part I find most interesting is that Gevlon is famous for his "no-holds-barred" approach to "Morons and Slackers". Yet his diagnosis is almost charitable. A muscular charity, though, to be certain, with a hard-nosed approach to solutions.