It's not a horrible idea to decriminalize pot. I would like to draw the line at drugs that can cause OD and death like cocaine or heroin. I see the aftermath of the "hard drugs" in the hospital just a little too often for my tastes.
Nobody ever died from a pot OD. That's a pretty good track record, and better than we can say for alcohol. I would have to make sure the DWI for pot was something with some teeth, though. People have this idea that you can drive just fine when you are stoned, but this is BS. I know from how stoned I always got I needed to be NOWHERE near a steering wheel.
Is there a breathalyzer for weed? Hmmm...