Also a lifelong non-smoker, I hold the position that this ban is needed and is lifesaving. Second hand smoke really is dangerous, there is a lot of science on that now. 
Yes, smokers feel picked on these days, but having watched tobacco devastate my parent's and grandparent's generations, I understand that  without at least some pressure, many today will keep smoking and endangering their children and others. 
We are at war with forces that are killing many of us, and we need tools like this, small as it is, to fight back. Freedom is allowing someone to climb a mountain and risk her life, or jump off a cliff with a small sail attached to one's back to fly. Few do it and few die. But smoking is the darkest of  evil that has killed many millions, it is an enemy that needs to be fought just seriously as any past army that was bent on killing Americans. The tobacco lords are the most evil humans to walk our earth. 
They talk of freedom only to enslave and kill.
Hugh Massengill, Eugene