dude, sexy fan art doesn't ruin a fandom, in fact it sometimes help it, what ruins a fandom are people like you who go around acting holier than thou, giving people stupid rules to follow and not letting anybody have fun all because you feel like acting like a dick, you're not protecting your fandom, you're fucking ruin it for the other members just so it can fit your stupid mold of a "perfect fandom"
also who cares if you've been called a personafag, every fandom ever has had insults made for them, stop acting like personafag is proof that it needs protection cause its not, its just proof that haters will hate just for the fun of it looking for reasons to hate it