A low tech solution is to use a laptop that doesn't have a battery and keep it plugged in all the time. When they grab the laptop the cord invariably comes unpl

A low tech solution is to use a laptop that doesn't have a battery and keep it plugged in all the time. When they grab the laptop the cord invariably comes unplugged and the thing turns off. Bonus points if you have a fake battery so the weight doesn't give the game away.