Turning this on its head, about password sharing. If 20 people have the root password, there is a single password that will allow your machine to be pwned. If

Turning this on its head, about password sharing. If 20 people have the root password, there is a single password that will allow your machine to be pwned. If 20 people have 20 passwords and sudo access, then any of 20 passwords will allow your machine to be pwned. You can't know which of the 20 people you're trusting to pick a password is reusing it.