The US did ban alcohol and it didn't work, and I don't think it'll work again.
To say that there should be a ban on fast food and drinking because it isn't healthy is just crazy. If I go to Burger King and eat a Whopper next to someone, they aren't taking in any of my calories. If I were to smoke right next to a person they'd be breathing in my smoke, and regardless of what year those stats were posted, second hand smoke is just as bad. Now will you be harmed if you're on the opposite end of the restaurant, probably not, but it's still disgusting, and I wouldn't want to eat with the smell and taste of smoke looming around.
We've had the ban is New York for a few years now. If you go into a place that was open before the ban, then go into another place that opened after there is a huge difference.
-Justin