Ah, yes. Like the disclaimer FFN adds on that website's guidelines that MA is mentioned although not permitted simply to illustrate what is not allowed in M rated fiction. I can bet almost no one actually read that part. By then, you just want to click that you agree and post your story already. There are things there rated M that are well beyond that rating, and contain enough graphic sex, unusual; fetishes, and gratuitous violence to require nearly every tag we have. They're not in prominent fandoms, however, which means they may never get caught and purged. The hypocrisy astounds me.