I guess prosecuting them would be the obvious one.
Well, in the case of deliberate school bullying, which usually includes many witnesses, I suppose it could be possible.
To be honest, I cringe at most AI art "parody" art of adult people, let alone revenge AI kiddie porn. AI "parodies" specifically meant to demonize people are often very LAZY, low effort, and childish. If I were dictator of a small country, I'd limit AI parodies, let alone AI porn.
I mentioned Bannon, for example. There were photos of him a few years ago that were doctored to make him look like he had leprosy, jaundice, and articles claiming he was going through liver failure from "alcoholism" and/or "late stage syphilis". I think this was before the kind of AI we have now, but they were computer-altered photographs, which is close enough in my book.
I see him recently on his channel, and the dude looks perfectly fine and photogenic for someone in his early 70s, his skin is fine, he has nice hair. At worst maybe he has eczema, but anyone who's Irish will have that. He's mentally sharp, so there's no "late stage syphilis". He doesn't drink. The doctored photos were all bullshit character assassination, which shouldn't be allowed IMO. In many countries, it's not.