what i think is that if somebody realy wants to get access to your system nothing can stop him with enough time he can break all those locks and crack all your passwords,the only way one can save his A$$ is encryption but just think how much time it takes to encrypt all the thingz you have on your system, god! i don't want to think about the reverse process there are times i have this feeling that security is just a game and i am only a loosza!
just imagine cops ringing you door bell what is the first thing you do?