i've privately heard the same thing about him. don't know anything about him myself other than the fact that he completed a #catallax bounty which involed testing a browser extension i built to. it was simple and i didn't need to trust him (only verify his work) so i can't speak beyond that limited experience.
i have to admit that i have a slight positive bias because he's one of the first people to actually use the catallax event kinds for real - making money - and that excited me. to be fair, the bounty was to republish for free paywalled content, so perhaps we already steered off the straight and narrow. ..but maybe its the case that a decentralized bounty marketplace's first users are bound to be "scammers" of some degree..? after all, 95% of people would probably consider users of Silk Road (and maybe even uncensorable social protocols) "bad actors" of some kind.
honestly getting to a flourishing, free and less rivalrous, controlled future is going to have to navigate roads a LOT bumpier than this.