There's a difference between "acceptable" and "illegal." I'm all for making drug users societal pariahs, but their illegality and the subsequent drug war is a disaster.
The current cure is worse than the cold. The laws of economics say that we cannot win the drug war in a free and capitalist society. There is a demand, therefore they will be a supply.
BWAHAHAHAHAHA!
Then they'd be unique. (Well, maybe they'd join smokers or SUV drivers or some other cause de jour.)
Societal pariahs like pregnant single girls? Men who lie or those who cheat on their spouse? Homosexual behavior? Celebrity criminals who write books and appear on TV shows?
Oh yeah. Our society makes societal pariahs, all right. Mostly Christians and those who favor a moral society. Those are the societal pariahs.