Why AOL Sucks #465,792: It is impossible to change the email address associated with an AIM account if that address is defunct. Presumably because AOL sends a confirmation email to the defunct address, which, of course, you’re no longer able to access.
Why AOL Sucks #465,793: It is not possible to register more than one email address to your AIM account.
Why AOL Sucks #465,794: When you think you’ve found a place to report the problem, and you get to the bottom of the very long and thorough form you are asked to complete, you see this.
