I wouldn\'t trust the accuracy of wikipedia, but assuming that it\'s correct, wouldn\'t it be safe to say that it would be in someone\'s best interest to limit themselves to two drinks early in the night if they know that they have to drive? Like I said before, it all comes down to self control.
This is probably the safest thing to do if you must drink at all. recently I have been having nothing to drink when I am driving. I have found the freedom of worry to be very uplifting to some extent. If you haven\'t had a drop then the police have nothing. And if you aren\'t carrying etc it is even better.
I have no problem with the police setting limits to BAC. What I do take issue with is the infringement of our constitutional rights because of MADD. Because of MADD it is OK for the police to setup "safety checkpoints" ie. Road Blocks. It was their organization that pushed for this crap. Now it is being used more and more under the guise of safety, when we all know it is a dragnet and IMHO and infringement on my rights as a US citizen. Having to stop and show papers simply because you happen to be on a road. That is about as unamerican as you can get. Of course SCOTUS says it isn\'t really an inconvenience so they say it is OK.
This is the major reason why the founder of MADD left the organization. She has stated many times that they have become fanatic about Prohibition and that was not the original intent of the group.
They have also encouraged police in Texas (where they are based) to go in to bars and arrest people for public intoxication (how being in a private establishment is public is beyond me). People who are just sitting there drinking, not near a car or whatever. They justify everything they do as "Think of the Children".
RE: Sleeping it off in your car.
It depends on the state but if your keys are within reach they can arrest you. If you must sleep in your car, DO NOT leave the keys in the ignition, DO NOT have them in your pockets, If you can lock them in the trunk or something. Of course it really will come down to whether or not the police officer really wants to give you a hard time. It sucks when people try to do the right thing by getting off the road and not driving to then get busted for it.