re: I think my roommate has been in my bed.

Maybe you should just show him how the internet has free porn that he can watch on his phone. If he already knows this, then he and his buddies are probably just fricking with you because you are too much of a puss to make them stop.

The idea of putting in a camera and calling the police is very lame. Either you are excited at the possibility of watching him "diddle" himself or you are very high strung and need to get laid. No doubt in my mind you have never had a girlfriend.