I'm not responsible for other people who choose to act irresponsibly (Diablo 3 Gold), and I'm not the police force for the rest of the world either.
In most situations, if an issue doesn't directly concern me personally, then I mind my own business.
Anyone who drives or rides in a car out on the public streets takes some risk of being hurt or killed in an accident, whether or not other people comply with laws and regulations. You could just as easily be ran over and killed by a licensed driver with insurance. That's a fact of life.
I know my brother-in-law uses/sells pot too, and I personally can't stand to be in the same room with him, but he's the breadwinner for my sister and their kids. If I reported him to authorities he'd probably go to jail and/or lose his job and economic livlihood, and put my sister and the kids on welfare or on the street (Diablo 3 Gold). Or worse, they'd be living with ME! No thanks.