There is a start button for cars that can detect alcohol blood level, but the liquor and restaurant industry are blocking it because it will lower their profits. If someone sober pushed the starter for the drunk, he would face criminal and civil penalties, perhaps a 2nd degree murder charge. The smart start button would reduce some of the 10,000 auto alcohol related death just as seat belts do. Drunks have such impaired abilities that at DUI checkpoints they can not count backward from 10 or say the alphabet. It's unlikely they could circumvent the smart start button without help. Society is partly to blame for these tragedies, by not insisting on implementing anti-drunk driving technology. People will come up with excuses such as cost, individual freedom etc.. It's easier to finger point than to do anything.