UNCxxx .... User Name Change, and then a sequential number in the order of processing.
We are in the process of purging usernames which are Copyright/Trademark violations and concerns. Users are given a "new" username (UNCxxx) when the old one is purged. They can choose another one, pending review and approval of a new username.
I think most folks would be shocked to realize how many usernames are actually a violation because of Trademarks. It's utterly staggering. BITOG does not have any desire to enter into legal action, and so we take a very, very conservative approach to this. If it even has a hint of being a problem, the username is changed. It's a reflection of the litigious world we live in. It's a matter of survival for BITOG.