I have an AIM account, when I set up that screenname, the one I wanted was unavailable. So I mashed some keys and got myself a screenname + digits and haven't thought twice about it for the last 5 years. Today I decided to see if the name I wanted was available or if AOL jams any name a user picks for eternity. Unsurprisingly, they said my chosen name wasn't available, but this time, before just giving up, I hit the "I've lost my password, here's my screenname" button just to see what happened. In the worst case, whoever it was would get a password reminder, big deal.