Create a screen name with the string AO at the end, something lame like ExploitGayAO. Now, delete the name and try to make it again, obviously it's not availible, but AOL will return an alternative, something like ExploitGayAO156. You can amaze your friends as you have your own 'restricted' screen name since AO1 and TO5 are restricted in a screen name, yes this is kinda gay, but why not?