This hasn't yet been an issue and I doubt it ever will be, but please choose a username that indicates your identity.
It can be your first name and last initial(s) or the whole thing(if it fits). As long as it includes your first name(and there aren't any other people with the same name), you'll be fine. Numbers are allowed as long as they aren't ridiculously long and/or random(you can add birthdays, birthyears, fav numbers etc....as long as they don't exceed 4 digits).
Upon seeing usernames such as captncrunch33493 or spacecadet007, I will ban the member(after notification) and ask them to re-register as "themselves."
This will help make things run much more smoothly in general.
Thank you for your cooperation.