<< Or does he know how to pass it? >>
Right now, he knows JACK SQUAT about the computer other than it can play Starcraft, RTCW, and MW3 as well as Quake and stuff.
Thing is... he might not know it now but he might in the future.
It is also about the other kid that can't get access to the stuff from their house and mooching off of an unprotected computer. And if he did know how to bypass it, it would be a simple open of the lid and capping the jumper since it is right there.