QuestionER tbh, so far I've only seen reader induced social pressure give negative feedback to said taboo subjects.
There was this one dude who wrote a hp fanfic, really well written until he is changed an pre hogwarts hp into a female kneazle with his magic powers and kneazle gangraped him for several chapters.
Naturally, the reader feedback was rather intense, to the point where the story was dropped (I think cause I didn't see it among newly updated stories since), but I don't think it was removed by wn despite the many reports it must have gotten.
So whilst I'm sure there are some official rules, I haven't actually seen them being enforced by anyone other than an outraged community.
I also haven't seen any issues arise with pridominantly erotica type stories, so that should not trigger wn.
That said... Please use common sense in what is and isn't acceptable to the majority of the public, don't make it something that's highly illegal in multiple countries, and try steer away from the highly fucked up shit if you really must write 18+ genres..
I think it's a waste of someone's writing skills if erotica is the only genre they spend them on tough....
