@hawkeye10,
Quote: so the question is how much risk is acceptable to add to driving to facilitate social drinking
And my answer would be none. I'm not interested in facilitating social drinking, nor am I personally interested in inhibiting it, and I see the whole issue of drinking as quite apart from the matter of what public behaviors individuals should be allowed to engage in when in an impaired state--public behaviors that affect other people.
I don't think we should actively enable any avoidable risks when it comes to driving. People are free to drink as much as they want--and they also have the responsibility of arranging alternate transportation if they drink over the legal limit.
Quote:In my opinion alcohol is a great benefit to quality of individual life as well as collective life so the answer is a fair amount.
Let me know when you're ready to let a neurosurgeon, with a .08, or .10 BAC level operate on your brain or spinal cord. Or let a school bus driver with a .08 or .10 BAC ferry children back and forth.
You're more concerned with drinking, and being able to drink excessively, than you are with anything to do with responsible driving, or with trying to reduce the number the number of alcohol-related auto accidents, injuries, and deaths. That's why you can't rationally consider the benefits, to the "collective", of reducing the legal BAC to .05.
And not everyone needs to consume alcohol in large amounts in order to be able to socialize. If you have to anesthetize yourself with booze to enjoy being around others, and alcohol is a form of anesthesia, I'd hardly see that as a boon to the social cohesion of "the collective" or something to be facilitated by "the collective".