Walking through smoke if you are not a smoker isn't pleasant.
Standing in an attraction queue near someone with B.O. or smelly gas isn't pleasant.
Being in a hot crowded park listening to kids scream at the top of their lungs or adults yelling at kids or each other isn't pleasant.
I propose a "no yelling kids kids, only soft spoken adults, no smoking, only freshly showered and with a health digestive track and diet area for anyone who wants it. I'm thinking take all of Frontierland and Liberty Sq. Employ dogs than can smell for smoke, BO and poops and have social workers that screen people for quiet temperaments.
See sarcasm and irony all in one.
Smoking sucks. I think even most smokers think something like that. Between the health factors, stigma, and cost it can't just be the pleasure of smoking that keeps you coming back. It is an addiction and not easy for someone to just stop.
My serious opinion is there should be a few areas spread around the park that are secluded to allow smoking in the parks. The few spots that have been in Adventureland over the years have never been secluded and therefore far less than ideal choices.
On the other hand, I support a full ban on farting in the parks.