trolling can describe also people like zedshaw or theo de raat even linus torvalds. People that have strong opinions often a tinge of humour, and sometimes are right against everybody. I think being confident in your claim even if it goes against the majority can be called narcisism I guess making a point without using the manipulation of feelings based on logic can be called psychopathy (vs empathy/fallacies) I guess also that they speak because they care when they feel a wrong idea is spreading ... I guess we can hardly make a distinction between a troll and someone that is disruptive (innovative)

We should tolerate trolls and love them because in the minority of this population maybe master troll bringing up new ideas.

The fact I am a troll does not mean I am a genius, nor that I have any interest lobbying for the usefullness of trolls :) But I think the non troll way of discussing is creating trolls: using fallacies, not accepting strong logical criticizes that can enforce an idea, the ad hominem based on authority rather than the construction of arguments, the lack of passion and sometimes humor that comes with.

So my point is trolling is beneficial to every communities, and it should stay fun.