Inappropriate Username?

As this is personal feelings mainly, I am just bringing this up for the Admin Team to review.

I feel a recent new user has an inappropriate username: KillinEvery1. Being a kid/family friendly site, I take issue with a username that is saying "Killing Everyone". But that is just my personal feelings.

Well part of our user agreement is:

"By agreeing to these rules, you warrant that you will not post any messages that are obscene, vulgar, sexually-oriented, hateful, threatening, or otherwise violative of any laws."

A username is not a message but it falls under items violative of any laws. The user cannot change their existing name which means it ill need either a message sent to him or a choice I would be more inclinned to do which is delete the user