Hi, thanks for writing in to us. Our filter has a set of words that it looks for when a new user signs up for an account. If their name contains one of these words, their account is flagged. At the moment, we have a minor bug that flags users who registered their accounts a long time ago, before a certain word was put in the database of offensive terms.
Unfortunately, it looks like this is what happened to you with the offensive word in question. But since your username was flagged by coincidence and not out of an obvious attempt to make an inappropriate username, I'll gladly lift the ban on your account. I apologize for any inconvenience or confusion this might have caused you.
Now back to keeping the street safe from rampaging elephants! Huzzah!