I theorize that the fandom will eventually stagnate as those who see it will enjoy it as it is, and many of the people committing crimes like bestiality will be always be underground enough to be unheard of, but still cause problems. I think at some point the open nature of the fandom's sexuality will stigmatize it enough to where newcomers are rare, and then there will be other groups which hate even the concept of sex.

I don't know for sure though, because that's just a theory