Interesting!
I'm curious now what's the process or how to request to change your username.
Is there any factor to consider?
I think the question should be asked the other way around.
What reasons does a user have to change their username? Is it because you feel your privacy is at stake? I think the current name is the result of an "identity theft"?
Anyway, I think that the argument that the user uses to make that request has more weight, instead of the criteria that the admins may have.