How about the horrible smell produced by those who smoke? It's super reckless to expose others to negative side-effects by somebody who can't control themselves and must smoke.
Newsflash. Not everyone who smokes „must smoke”. And trust me, in order to smoke responsibly you actually need a ton of self-control.
The good news is that vaporization doesn't smell as much (or linger as long) while being nearly equivalent in effects, and edibles don't smell at all. I think users and non-users should be able to coexist peacefully by making a couple of compromises.
There are also restrictions where you can and can't smoke, like schools, playgrounds or sports fields.