Censorship
the suppression or prohibition of any parts of books, films, news, etc. that are considered obscene, politically unacceptable, or a threat to security.
The only leg you might have to stand on is the obscene thing. Politics have nothing to do with wow and security probably means on a national level, but even with security from the game perspective... they should have the ability to protect their products and customers. That ties into the obscenity argument.