Whether you are a smoker or not, I think this is a very civilised idea. Air travel is very stressful at the best of times, and think of when there are delays. It must be awful for smokers.
They do not want to pollute everyone else. It is just something they do. Leave them alone for God's sake and let them freeze on the garden terrace. Obviously DA had some stressed out smokers, or they have bloody common sense! Non smokers can stay inside in the heat and enjoy that, I'm sure the smokers would not like to be within a million miles of the holy Joes anyway.