I really don't think people should be driving stoned, drunk or tired. I'm always uncomfortable in cars where the driver smokes a big fatty. It always seems to be done with the notion that you can't get in trouble for it. Well, you sure as hell can wreck a good paint job or someone's nice new leased vehicle while increasing everyone's insurance rates by driving impaired. Oh, and you can injure things while your at it to the point of possible death. I suppose if there is an undefined grey area, and they cannot confirm that the small amount in your system isn't impairing in nature, then you've got a flawed system and someone who smoked 3 hours ago could face fines or a license suspension. What do you think of this?