The other issue kids will always find ways around these tactics. Breathalyzer sure do not take into account other pharmaceuticals. I'm also wondering why there was an increase of hospital visits and stomach pumping? There is more to the trend then just alcohol. Pushing it completely underground will come to no good. As one poster said, the students will probably just head on down the highway to find a good party. It's what kids that age do. It's what they always did.
And then of course they will all drive back drunk and probably kill someone on I-74 while going 110 mph! Not a good move to completely ban drinking. It didn't work 90 years ago, and it won't work now.