NYT: In professional kitchens, where the hours are long, the pace intense and the goal is to deliver pleasure, the need to blow off steam has long involved substances that are mind-altering and, often enough, illegal.
I think it's safer than alcohol. I've seen alcohol destroy many lives. Leave the the smokers be.
I don't tell others what to do if they aren't hurting others but the cops might object,they have no sense of humor about this kind of thing