I have a much neater idea. We don't allow signed-on members or Guests who have no spaces in their name. If you've got a space - i.e. at least two components to your name - then you're in. No space - no status. This is simple and effective. So - from the posters above, we get rid of:

Foulestroupe (yup - you're the first to go)
PoppaGator (sorry Pop)
Eliza
999
Jeri
Akenaton
Q
JohnInKansas
999
... and so on

But we keep:

me (naturally)
Charley Noble
Richie Black
Guest From Sanity
Little Hawk (but NOT Chongo - note)
Joe Offer (phew!)
Herga Kitty
... and so on.

Now... if JohnInKansas becomes John In Kansas, PoppaGator becomes Poppa Gator and Foulestroupe becomes Foules Troupe, then they're in.

It's devising little things like this that keeps me sane...