[wp-forums] Inappropriate username?

[Mr mist]

In message 
<AANLkTinv-kHdtauz=YNtopw0D+v1OOfJkuorVGbwaYdW at mail.gmail.com>, Otto 
<otto at ottodestruct.com> writes
>I was just looking through the code and I was surprised to see that
>there wasn't one of these.
>
>I can put in a quick plugin for it though, easily. Anybody got a handy
>list of things that would be inappropriate in a username?
>

the @ sign.  So as to stop folk registering with their e-mail address as 
their display name.
-- 
mrmist