It's very strange what the automated system blocks, but actual GMs see as okay. I have a few friends who made incredibly questionable names on the basis that:

1) They were starting together and couldn't think of a good name yet, wanted time to think about it, but also wanted to just jump right in.
2) Surely they could just report each other later, take a strike, and rename.

It was a strat that has worked on other MMOS without fail. SE took a look at these obviously explicit innuendos and went "ALL GOOD AND CLEAN HERE! HAVE FUN, ALL!"

The reactions they get in roulettes are gold.