That's ridiculous. If you have .08 BAC, you are impaired as a driver. At below .08 BAC, you're impaired. Some people are more or less impaired, sure, but you have to draw the line somewhere.
a chronic alcoholic -- ie, someone who drinks himself to .2-.4 BAC regularly for decades on end, is certainly not impaired at .08, and in fact is probably better suited to drive at .08 than he would be at 0 and in the throes of withdrawal, shakes, delirium tremens, etc.
that all depends where your sympathies lie my man. the DUI industry has given rise to a few destructive and distinct effects: erosion of the 4th amendment (see http://en.wikipedia.org/wiki/Michigan_Dept._of_State_Police_v._Sitz , Thurgood coming down on the correct side of a 4th amendment issue, as usual), cultural deification of law enforcement, and the treatment-industrial complex slush fund. naturally I hate all of these things more than I hate people who drive while drinking or drunk.
If your sympathies lie with the perpetrators of automobile violence rather than its victims, may I kindly suggest you rethink your life.
other (driving should be illegal, it's uncompensated labor, all driving should be done according to labor laws).
wow, uh, erm, thanks for making me feel reasonable and moderate on this issue