This is a difficult issue to deal with, but I think the problem lies with our current acceptance of photographs as an objective truth. If a talented writer places someone in an erotic text, we immediately know that this is a product of imagination. If a talented artist sketches up a nude of someone, we can immediately recognize that this is a product of imagination. We have laws around commercial use of likenesses, but I don't think we would make those things illegal.

But now we have photographs that are products of imagination. I don't have a solution for this specific issue, but we all need to calibrate how we establish trust with persons and information now that photographs, video, speech, etc can be faked by AI. I can even imagine a scenario in the not-too-distant future where face-to-face conversation cannot be immediately trusted due to advances in robotics or other technologies.

Lying and deception are human nature, and we will always employ any new technologies for these purposes along with any good they may bring. We will always have to carefully adjust the line on what is criminal vs artistic vs non-criminal depravity.