Could be worse, I guess. They could implant it in yer butt. Paying for a soda then...well, I don’t want to think about it.
I think it could work , but maybe I'm overlooking something. Of course I may be biased in favor of my concept by having had my car totaled by a driver's 2nd DUI conviction, with his 3rd coming within six months later. I wasn't hurt. But had I not been paying enough attention to modify our crash he'd have been spared his third by a vehicular manslaughter conviction. It shouldn't take that much to keep such off the road. Going through the legal system to enforce publicly passed legislation takes care of personal liberty concerns and they could also be judicially unchipped if lawmakers could find some appropriate criteria. We can't seem to put enough brains in the drunks to keep them from driving, much less from drinking. Maybe we can put the needed brains in our cars instead. I know some current plans prevent drunks from driving specific cars, but I don't want them driving any cars. Retrofitting the the whole fleet isn't reasonable although a court might mandate his family's vehicles be so equipped. But, unless Obama turns us into the next Cuba for classic cars normal fleet attrition would empower my plan.