Sexism

I know this is probaly gonna attract a ton of trolls but...

In http://eu.battle.net/en/community/conduct There is no rule about sexism. Why is this?

I may be reading it wrong but all it notes is about sexual preferences.

• Causing disturbances in forum threads, such as picking fights, making off topic posts that ruin the thread, insulting other posters

• Posting annoying messages and flame-baiting in the forums. I.e. trolling: http://eu.battle.net/en/community/conduct
• Posting annoying or irrelevant messages in the forums. I.e. spamming and/or trolling: http://eu.battle.net/en/community/conduct
• Posting annoying (insulting) messages in the forums. I.e. trolling: http://eu.battle.net/en/community/conduct