you have not read my post, have you?? this does NOT scan your brain, it detects alchahol on your breath. it does not determine if you are going to speed or not, it doesnt even record speed. if you blow above a certain limit, then the car will not start. THAT IS IT! if anything this is like airport security, when the security guards chek your luggage for anything harmfull to others the only thing they are looking for is anything harmful, not to look through your dirty laundry. YOU in particular may have never tryed to blow up a plane, but you allow them to search your luggage anway because you know that they are doing this to ensure your safty. this is what the interlock does, it is not looking to catch you speeding, as it is designed only to detect alchahol.