Not fully related but you reminded me of this. Around the time of AOL3 or early AOL4 someone found a user name exploit. When making a new account, on the clie

Not fully related but you reminded me of this. Around the time of AOL3 or early AOL4 someone found a user name exploit. When making a new account, on the client side use winapi's EM_LIMITTEXT to bypass the max character limit on the input textbox. Enter one or two letters, a bunch of spaces, then some more letters. The server side would truncate to the original length, leaving you with a one or two letter username, working around the 3+ requirement.