Framing it in that way is essentially a get out of jail free card - anyone caught with CSAM can claim it was AI generated by a "clean" model, and how would the prosecution ever be able to prove that it wasn't?

I get where you are coming from but it doesn't seem actionable in any way that doesn't effectively legalize CSAM possession, so I think courts will have no choice but to put the burden of proof on the accused. If you play with fire then you'd better have the receipts.

This seems like a long way of saying “guilty until proven innocent”.