that I can think of, is the so-called "security questions" that will "help you recover if you forget your password"! Questions like, mother's maiden name, town where you were born, your first school, your first car etc. etc.
How bloody stupid can these idiots possibly get? If I wanted to hack somebody's account I'd head straight for the genealogy sites!
I DO NOT loose passcodes, nor can I remember them, because I use an encrypted passcode wallet and every passcode in there is long and completely random. When some idiot has written mandatory security questions into a site that I need to use, every answer is a complete lie which I then have to enter into the free text field of my passcode wallet. So for me these questions are not a security risk just a damn nuisance.