A person sitting to my left is smoking, the person to my right is having a drink in DCA. The person to my left is sucking on a cigarette immediately affecting the quality of MY life right there and then. The person on the right is sucking on a straw immediately affecting the quality of HIS/HER life only. I am against drinking and driving.
Plus they could be smoking pot which smells super nasty. We don't need that at Disney. Since pot is legal I don't see how Disney can pick and chose which products they will allow you to smoke.