when you registered, right above the line where you entered your display name, was the line:
Publicly Displayed Name (This name must conform to our naming policy):
That would seem to imply we have a naming policy.
This policy is strictly enforced. You can always go to
this thread to discuss the policy, but i'd advise reading the whole thing first to avoid re-hashing any argument.
There are only two hard things in computer science: cache invalidation, naming things, and off-by-one errors