I was signed-up on a work pc, auto-login, from a work email address. Quit the job, forgot the password, and just signed up again from my new email.
I did the same in 2000, but one day I had an revalation and remembered by 1998 password...woohoo, 1998 sign-up date saved! (After that incident, I considered getting a back-up name...but was too lazy)