it's definitely not murder, you're going way over the edge if you think that, though second-hand smoke still greatly increases your chance of getting some of the same diseases and illnesses that smokers face, which I'd say counts as a public safety risk. That's why it's banned in restaurants and other places where there are lots of people in a relatively small space, so you aren't exposing dozens of people to secondhand smoke. I doubt it's going to be banned in big open places like outside of buildings, but it's a possibility.
