I know Turbosquid has a reputation for hosting overpriced items without checking first to see if they're stolen from some other mesh creator, but they apparently make some kind of effort to remove stolen items if notified by outsiders or other watchdogs. Telling people not to redistribute Turbosquid items as freebies is 100% correct, but maybe you should modify your statement so it can't be construed as using Renderosity to encourage a boycott of Turbosquid. Although they probably make plenty of money selling $795 basketballs and aren't worried about competition, it could be construed by a tricky, sneaky lawyer as "unfair trade practices".