Why is it so difficult to tell the people to not use the same passwords everywhere? I thought of a service which searches all leaked databases and predicts a password based on that as a warning for the user... Having the program told you that your password the user is likely to enter would be XY, because the adobe OR MySpace OR Dropbox passwords for the email OR username entered was that password could be a bit more aggressive but useful to let the users at least think of secure passwords.