To update an old teaching for modern times: He that is without security lapses among you, let him first impose sanction on those who have. Or to put it more bl

To update an old teaching for modern times: He that is without security lapses among you, let him first impose sanction on those who have. Or to put it more bluntly - all users have flaws, and if your system relies on users not having flaws for being secure, it isn't.