I agree that the author's understanding of the term is imprecise but rather than refer him to an etymology of the term, I think this wiki would be more appropri

I agree that the author's understanding of the term is imprecise but rather than refer him to an etymology of the term, I think this wiki would be more appropriate to convey the term's common usage: http://en.wikipedia.org/wiki/Troll_Internet http://en.wikipedia.org/wiki/Troll_Internet