Why is that so hard for people to comprehend? You don't like smoke; there are of places that are smoke free. There's no need to legislate EVERYONE to be smoke free.
Because it is not about the so called dangers of second hand smoke it is people are enjoying themselves and that burns the antismoking neo-purtan health Nazis who basically live miserable lives and want everybody else to also.
From Forces.org
"There is only one honest impulse at the bottom of Puritanism, and that is the impulse to punish the man with a superior capacity for happiness." H.L. Mencken