Oh I know Dan had motivation, the troll reference was merely an example to demonstrate my point. I can see how Dan may have not been happy about the video (which found rather amusing personally, but that's irrelevant), but, as a professional, he didn't handle the issue in a very professional way. I'm not a Sperry hater, nor am I a great fan of his, but I feel that anybody reacting like that in such a situation is in the wrong, regardless of who it is.His motivation for saying what he said was the parody video made by incredibrent. It really wasn't that funny, http://www.youtube.com/watch?v=qsjJTHzt9y0 . I think Dan got a lil irked because he basically mocked his performance. It wasn't that Dan was "trolling" as you put it but just stating his opinion about incredibrents antics.
Trolls however have no motivation other then to cause a reaction.