Do we just need a few expensive cases of libel so solve this?

This was my thought. The author said there were details which were hallucinated. If your dog bites somebody because you didn't contain it, you're responsible, because biting people is a things dogs do and you should have known that. Same thing with letting AIs loose on the world -- there can't be nobody responsible.

Either that or open source projects require vetted contributors or even to open an issue.