I think it's not feasible to stop or control it, for several reasons -

1. People are motivated to consume ai porn
2. There is no barrier to creating it
3. There is no cost to create it
4. There are multiple generations of people who have shared the source material needed to create it.

We joke about rule 34 right, if you can think of it there is porn of it. It's now pretty straightforward to fulfil the second part of that, irrespective as to the thing you thought of. Those pics of your granddsd in his 20s in a navy uniform? Your high school yearbook picture? Six shots of your younger sister shared by an aunt on Facebook? Those are just as consumable by ai as tay tay is.