Ok..I got a reply:
The denial at the time honestly was due to the username, combined with the fact of previous problems with a "troll" (old Usenet term for those with no intention other than to start trouble or flame wars) using a similar username about 2 months ago.
So it was by no means anything personal. My apologies if it seemed like such or heavy handed. And you are free to re-register at any time, though for the sake of things I wouldn't suggest using such a moniker for that purpose.
Arcanum Cafe www.arcanumcafe.com
So. I guess if I change my name from what I used to something else, something innocuous, I can register......I'll think about it.