SparkyGump, why stop there? What about nicotine, caffeine, aspirin, tylenol? Where do you draw the line? I say when one is impaired. Not all drugs are the same. Youtube the "Speed UK stoned" driving test. The driver drove better stoned than sober. Not the same for booze and many pills. Let's not pretend that a cup of coffee is a 12 pack of beer. For an experienced user and driver, is a joint that big of an issue? If they can pass the roadside sobrierity test, they are good in my book. Zero tolerance? Then test for caffeine, it's a drug!

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