While this is definitely a crime, it's also similar to books where authors "fantasize" killing people, both are pretty much equally treated in the court of law in a lot of countries.

Full on prosecutions does feel like a thought crime in this case, but I strongly believe that these things should not be available on the internet anyway and to give platforms and authorities the power to treat this content the same way as CSAM when it comes to takedown requests.

I mean just look at steam 'rpg maker' games, they're absolutely horrifying when you realize that all of them have a patch that enables the NSFW which often includes themes of rape, csam and more.

I do not recommend anyone to go down this rabbit hole, but if you do not belive me: dlsite (use japanese vpn to view uncensored version). You have been warned.