Discrimination bans?

What's up with this? I noticed this yesterday among the ban messages that get shown while playing and I want to know what exactly it refers to. What do you need to do to get banned for discrimination?

I ask this cause I regularly discriminate against blood elves on Horde. I straight up refuse to group up for anything with them and actively insult them whenever I can because I hate them so should I be expecting a ban soon...?

http://forum.warmane.com/showthread.php?t=65037
"Racism/Discriminatory Behavior:
Avoid at all costs, insulting someone's country, culture, lifestyle or skincolor. Even if you are just "joking" it isn't allowed. Slangs such as the n-word aren't allowed either, even in Guild chat. Don't blame guildies for reporting you. It's wrong and you should know that."