I'm sure Renderosity has a vested interest in discouraging and preventing the spread of warez.
I'm also sure that applies more directly to the spreading of Renderosity Marketplace warez.

Now, if it could be done practically, and efficiently, I'd say the best place to start on the crusade to alienate the warezer's would be to demand serial/registration/proof-of-purchase info for the target application before any purchases from here could be finalized.