I believe you're wrong on the fraud aspect, gate.  Far as I know, the purchaser of infringing content can't be held responsible for its use within the terms of use/license agreement which comes with the product.  In this case, I believe the law assumes the purchaser bought the item in good faith, unless there's clear and distinct evidence to show otherwise.

Keep in mind this has happend several times here and Renderosity - after consulting with their legal experts and the victims of copyright theft - will advise the purchasers of their options which usually boil down to:

Delete the bad content and receive a refund, or

Keep the bad content - if the victim gives permission - and use it as you would a legitimate product.  Please keep in mind this applies only if the victim gives permission.

Both scenarios have happened here in the past and good faith is always assumed on the part of the purchaser. 

A perfect example of the first scenario was a texture set series made by someone under the name of SuicideGirlz.  When it was found the name and the tattoos used were in violation, the products were pulled and people were told to delete them.

The second scenario happened when a vendor called ByteMe0k was found to have stolen textures from another artist, StefyZZ.  In these cases, Stefy gave permission for the stolen products to be used legitimately.  Renderosity, in this case, also gave customers the option of a refund on condition they deleted the offending content.  I took the option to keep them since they were useful to me at the time.

Coppula eam se non posit acceptera jocularum.

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