smoking is a dangerous habit FOR THOSE AROUND YOU.
It baffles me how a person can happily light up, and fill a room or corner with a foul-smelling POLLUTION without as much as an apology. Sometimes they'll exhale it, like hey, let's all enjoy a mixture of co2 from your lungs + some toxin smoke byproduct.
I'm cool with people dipping til their stupid-ass jaw falls off. But smoke affects others. Everytime I see a person smoking in a car with their kids, I seriously want to hit them with a brick.