If you’re not a convicted drunk driver, should you still be required to have an in-car breathalyzer fitted (at your expense, ‘natch) to your next new vehicle? Apparently, some automakers — including GM and Toyota — think so. They and a few others are working together under the auspices of something called the Driver Alcohol Detection System for Safety, which is a $10 million federal “research program” that is trying to develop just such technology for mass introduction a few years from now. At the moment, the only people who have to deal with (and pay for) in-car Breathalyzers are...