Well, for starters, whuppingboy, why should we even try to make everyone happy? The safest thing to do would be to simply ban alcohol, pot, and any other substance that inhibits rational thought to the point where it endangers innocent bystanders (and the person themselves, but that's their choice). People will scream and people will break the law (like the do with pot now), but it would reduce incidents.
But, I understand that we live in a democracy and I have a family that I want to protect (in more ways than one) and I have religious convictions and...
So, I will first start by agreeing with you. Either you are for it or against it. However, from a safety standpoint, I don't think that banning is necessarily unreasonable if enough innocent people are being killed each year. But, in order to determine that properly, we would need to take a few measures first.
Okay, so we leave things alone, but we increase enforcement. If you get behind the wheel drunk and kill someone, no defense of "reduced capacity" should get you off. It's vehicular manslaughter and depraved indifference and in nearly every case, you should serve the maximum. Enforce this and soon enough, the problems involved start taking care of themselves because the costs become too high for most people to take the risk.
After this has happened, then take a look at the statistics and see if any further action needs to be taken.
And whuppinboy, don't get me wrong. I think people should be free to choose to do whatever they want. If they want to smoke pot or drink alcohol in a way that doesn't affect innocent people around them, then who am I to tell them they can't. But the second they do anything that affects people around them, it needs to stop.
And even if it is legal, there need to be sufficient warnings, which cigarettes have, but which alcohol doesn't. If someone decides to smoke or drink, it should be an informed decision whereas right now, it is determined originally primarily by peer pressure.
Here's a question. How many people here when they turned 21 (or when the will turn 21) felt (or feel) like they were obligated to go bar hopping? It's like a sick rite of passage.
As far as holding bars responsible, I like the idea of taking the keys and administering a breath test. A bar's liability should extend only to whether or not they are following those procedures.
And I don't pretend to have all the answers. So, here's my line if you will, but I don't deceive myself into thinking it is a perfect answer. It is merely an attempt to present something that everyone can be happy with. Rebuttal and further suggestion is welcome.