MADD has adopted a slogan that they will Eliminate Drunk Driving and it seems clear that new developing technology will attempt to impose passive alcohol sensors on all drivers. 

These devices follow a variety of proposed avenues to sense the presence of alcohol and deny the owner the ability to start their car.    We already have "blow-and-go" devices for convicted drivers, but our prediction is that the MADD mamas will try to have them put in all cars.   The passive devices won't work without all kinds of side effects and ultimately they will want to have us all blowing into an interlock device to start all new cars.