Like it's not enough that I remember my first ICQ number while having no use for it.
Thankfully the ICQ support doesn't care about security, and I was easily able to get back into my account without the account's email address or password, but purely by naming three people on my list (first names only.)
I've always had a head for numbers. Old credit card numbers, bank cards, phone numbers I only had temporarily, etc -- but do you think I could remember the name of someone I met five minutes ago? Not a chance in hell.