Law related stuff - 18 USC 2257 some questions on it.

Okay so I'm a prospective buyer and just learned about c4s and was shocked to see that they had so many navel videos (my personal fetish). I'm itching to peruse the site to find some more and maybe buy a clip or two but I just wanted to ask, as a customer, let's say an ignorant/foolish studio owner fails to keep records of his/her models pursuant to 18 USC Section 2257 and a customer buys a video from that owner? How would a situation like that play out? Could the customer ever be screwed over for a studio owner's carelessness? And just to note, this is a completely hypothetical situation I don't wanna tick anyone off lol. I'm just careful when I buy porn online. Thanks a lot fellows.