Now if we can just figure out how to prevent them from keeping the password written on a sticky note.
This is exactly why we need two-factor authentication for the encryption to be secure. If the password is too complex/long, it will be written down. If it's too easy/short, the password can be brute forced.
And they WILL write the password down.
"The most important thing in a man is not what he knows, but what he is." -- Narciso Yepes