I'll add in my nickel to this. We REQUIRE users to properly tag their stories, so that if it contains content which may be objectionable to a reader, they know to skip it. As long as the characters in question are fictional, if you look at the story tag listing, you'll see exactly what we do allow.
Because it's something you don't care for, or for that matter, that I don't care for, doesn't mean the author cannot post it. As long as the author follows our ToS and CG, we do not censor content.