My friends are paramedics and they see medical reports.
What do they do, drug test the corpse? Then if they smoked pot in the last few days that must have been the cause of the wreck?
Go to the Caribbean, mon. Pretty much everyone is stoned all the time, and no one is dying from it. People drive cars and get by just fine. I know plenty of people here in the states who are never not high. All of them drive everywhere they go; some of them operate heavy machinery for a living. On a low budget redneck construction site, if you are the one guy who is not high, then you are the oddball.
I just don't buy that pot impairs motor skills. The government will tell any lie about pot. A few years ago, buying a bag of weed made you a terrorist. The Office of National Drug Control Policy has some of the most ridiculous ads on TV. Their Super Bowl ads are always rated at the absolute bottom - our tax dollars at work.
On a side note rant, every time I walk into Home Depot and see the sign that says "Welcome to our drug-free workplace. If you use drugs, don't bother to apply" and then go into the store to be ignored by every orange apron there, at least the ones who don't rudely tell me that they can't help me because it's not their department and walk off, I wish they hired people on drugs. They could not possibly get worse employees than what they have under the current policy. At least stoners are polite and incompetent.