I don't have any problem with such systems to prevent drunk driving, but I still feel like we go about the drunk driving thing completely wrong most of the time. We need to make it easier for people to drink without needing to drive, and make it easier for people who did drive and then drink more than they should to find their way home through some other means. Obviously some of this involves my master plan to move you all to Manhattan, but as that might take a little time there are smaller steps which can be taken. I'm sure many of you are familiar with places that don't allow overnight parking and will ticket and tow. Even in places with decent mass transit, the systems shut down too early. Very small changes to zoning mandates could put that neighborhood bar, now across an 8 lane road with no crosswalk, within reach of that neighborhood.
A big reason people drink and drive is we put bars in the middle of giant parking lots far away from any human habitation. I'm not sure what they expect will happen, but I think the consequences are pretty predictable.