I have to say, the rule about changing your display name once a week, while understandable at one level, is really unreasonable at another. What it doesn't take into account is making an error and having to go a week without your name. In my case, I was trying to change the font and it ended up rejecting what i had put in a set it to my username instead. I could understand if they said "x" number of times per month (but more than once), or have you pay a fee to change it more than once, but now I have to wait a week to get my name back.