A lock only keeps an honest man honest. Same goes for a password. While a more complex password will do the job much better, as does a better lock, neither will keep out someone who wants to get in. Rather than meaningless password strength meters next to the password box, there should be some graphic that helps create or suggests stronger passwords. It may not prevent them from using more common passwords or phrases but it might better get their attention. On the other hand, some people just don't care enough to be bothered.