I do think that our username policy is handled very badly at times.
People are blocked for offensiveness when the offensiveness is rather
arguable; people are blocked for impersonation if they happen to pick
a name that's close to an existing user; people are blocked for
impersonating a well-known person when they're actually using their
own real names. Very rarely is it explained properly; very rarely is
the person given an opportunity to change their ID or to challenge the
decision.
It seems that we constantly assume 'Vandal!' in this case.
-Matt