File this under dope shit.  Are you sick and tired of your roommate eating your leftovers or borrowing stuff that isn’t his.  Well this is a cheap way to notify you when he’s being sneaky.  For $25 bucks you can pick up a lazer tripwire.  The ones that Catherine Zeta Jones got all slinky over in the movie Entrapment.  If someone breaks the beam an alarm will sound and you’ll know that bum of a roommate of yours is putting his sticky fingers all over your stuff.

Wild Planet Lazer Tripwire