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Sure, but I think what ckozlowski was saying is that even though these particular users may have no value in themselves and their (lack of) discourse, they bring attention of other well-mannered users that then get into intelligent discourse.

Trolls are a bit like political extremists: if they weren't here, you wouldn't talk about the ugly stuff so much and make sure it's kept in check.

Not quite disagreeing with you, but I think in this case there's a difference between your trolls and the "argumentative/easy to be offended" types. The latter are what I'm referring to.

Do trolls say that they have no evidence for statistics ... then use them anyways?