Just have it rebind all the necessary keys to break in when you run slock and then bind them back when you're done; that way no one will really be able to guess the proper key sequence, especially if you use an alternative layout like dvorak. (That way they can't login if they know your password, and they can't get out of the session because they have no idea where ctrl, alt, and f1 are.
-- Samuel Baldwin - logik.li
