The device tests the wearer's sweat for traces of alcohol and tampering with it alerts the po-pos. The same company also makes devices used to monitor those under house arrest. I actually had a crush on a boy in a SCRAM once—we were waiters together and made out in the walk-in fridge. Gotta love the bad boys ... and girls. Hollywood sure does, because here are the celebs who've been told to SCRAM.