I e-mailed JH and told her to write to customer service and it could get changed. I understood the question as to anyone going into their profile and changing a name, that doesn't work as far as I know..
you are correct, that doesn't work. We like to know when people want to change usernames because obviously we don't want people changing their identity whenever they want to (too many possible abuses of the system).
However, there are sometimes legitimate reasons - privacy concerns for example. In those cases we will help people change it.
I am the editor, but I also speculate, ask questions and play devil's advocate. I reserve the right to change my mind.