I was banned for naming my guild 'Pedobears'. If you don't know Pedobear, then I can tell it's just an internet phenomena and a joke, and there was absolutely no harm intended in naming my guild 'Pedobears'. Now I think that it would've been a more appropriate solution to the problem if they just messaged me in-game and said "Hey, you need to change your guild name" instead of just banning with no warning, telling me that they'll be replying shortly without actually doing so for days, so far.
Now they said that naming my guild Pedobears was highly sexually inappropriate and that would rank in the top offenses, but I have a spotless history of playing WoW. I've played for years, with one big break in between, without ever breaking their rules or getting suspended or warned in any way. They said they were going to investigate my account for previous offenses etc. and then decide after doing that.
But still... I am banned without a warning, my game-time is being spent and they're not replying to my appeals. Their customer service outright sucks.