This has been going around for a long time but is not true. But honestly it isn't a half bad idea. Other than a palindrome (like what Rick said) it can't be very hard to program it to automatically send an alert to a local police station with the ATM address so they could have someone check the area. Of course some people would abuse it, but it would be tracked back to the user's card and if it was made a serious offense would keep people for doing 'just for kicks".