if someone has been smoking grass and they are driving i have moderate consideration and i watch the road with them - but, if a driver has had a beer or two then i become a bit uncomfortable - there are deaths every day and every night due to drunk driving, but i dare you to dig up even 1 fatality per week that can be attributed to stoned driving - if those numbers were anything like even accidents due to cough medicine then the anti weed people would already be all over it, but i have not heard any statistic that says people so much as stub their toe more often if stoned.. i don't own a car, so i may have a bit of a different perspective.. i just think that unless you are pulled over totally by random then you are spacing out and the cops can tell - at that point then you are in trouble regardless if weed is legal or not.. i do not want it to come to some kind of invasive road side test every time someone is accused of driving stoned.. there should be some leeway - maybe you have to wait 30 - 60 minutes - therefore, you cannot be toking up while driving - that is across the line - just like you can drive while under the influence of codeine, DXM, small amount of alcohol.. common sense rules the day in my opinion - when pot becomes legal we will get the system of regulation down to a comfortable day to day affair and we won't need to waste vast amounts of money regulating something that is not very dangerous..
more to the point, i think that driving drunk is a much more serious issue since we know that it kills people regularly..
i don't know if i would smoke Phillip Morris brand weed or any mass manufacturer - buying local from individuals in the know will always be the best smoke i think.. i can imagine the ground up, stemy, dirt brown, mexican, incestual half breed, urine soaked, pesticide ridden, disgusting-ass-shit that they would produce.. lol.. i would try it for a lark..