Well I've been posting writing in fandoms since I was like 9 writing warrior cats fanfiction, so just "being used to fandom" is probably part of it, but the other parts are "stop being a hardcore anti who thinks anything kind of atypical is evil" and coming to the understanding that a revulsion or disgust response shows something about you and not something about the think you got disgusted about. If you think of watersports and get really yucked out that doesn't mean people who are into pee are evil it means you don't like pee. Which is fine but don't be a dick about it. Demoralize it and it will probably gross you out less. I'm a germophobe so I can't get into things like emeto or watersports in a sexual sense but writing it doesn't bother me because it's not real and I'm not actually getting dirty. This also comes from a POV of me not really being upset by things though.