It's so frustrating and upsetting. My favourite fic in the world is Sympathy Crime, a Persona 4 fic by sodomquake. It's a harrowing, beautifully written story about an abusive relationship, and about the victim and his friends trying to deal with the fallout after the relationship ends. It's written with so much thought and care and sympathy, and in part it's an outlet for the author's own feelings of helplessness when friends of hers suffered abuse.

The author was doxxed and forced to delete her AO3 and Tumblr. The people who came after her hadn't even read her work; they just saw it was tagged 'noncon' and 'underage'. In other words, she warned responsibly, and because of that she was driven out of fandom.

Fiction is a space in which it's possible to explore dark concepts safely. If an author 'inflicts' fictional harm on fictional characters, that doesn't matter, because nobody's getting hurt. If people try to 'protect' those fictional characters by harming the author, a real person is suffering. I think it's ridiculous to frame 'protect the fictional people, attack the real one' as the moral stance.