Plus, the idea that the pilots would become intoxicated inhaling secondhand smoke is laughable. Isn't the whole volume of cabin air changed out with fresh air every couple minutes?
Maybe they don't want to get off the plane stinking like an ashtray? I don't know if you've noticed but smoking has been banned just about anywhere that people who don't smoke are liable to be. Personally I couldn't care less what you smoke, inject or snort. You are an adult (I take it) and it's your decision. But when it comes down to your lifestyle choice affecting me, even if it's just making my clothes stink, then I draw the line at that.