Just met our mutual friend for the first time on this thread I started, pitching for investors for our A round:
https://bitcointalk.org/index.php?topic=358242.0Wasn't a proper trolling, but he was getting there. Wouldn't say he harmed our business (had eight responses from potential investors), but certainly went on the attack.
My second ever 'ignore' after Mr Crumbs.

EDIT: full disclosure - the ornery bugger was actually half-right about us. Our plan was indeed flawed, and we ended up retracting the pitch. But we're a genuine 4 year-old company and I personally couldn't be bothered dealing with a neo-nazi teenage troll screaming accusations.