Here they now do drug testing as well as alcohol testing when someone is pulled over at a Random Breath Test station or even on the street. If a cop finds evidence of weed in the system, that person will either cop a fine or licence suspension the same as if they were drunk from booze. AND if you are stoned while driving, your reflexes and judgement will be just as fucked as drinking a few beers. Get into a prang, and you're just as dead. Or crippled.
So don't bullshit about stuff you don't know, Scrap.