The powers that be can change your username, although I don't know if they honor requests. I had my username changed against my will on rule34 because it had invalid characters in it (no hard feelings).
In case you do request a name change, just so you know, any pictures you post as "habedi" will disappear from your profile (not from the booru), and old forum posts and comments will still have the "habedi" name. You may as well just make a new account if you want a new name and use the mail system to tell any friends that you've moved.