It smells terribly, exposes others to negative health effects without consent and is one of the biggest causes of littering. Simply put it is a major nuisance with no benefits apart from profits for the tobacco/drug industry and addicts getting their high.
Could probably extend that to anywhere around minors in general too.
Or you never lived in city with polluted air. Headaches, memory impairment, bad sleep, cant go outside, get a fresh breathe, no sunshine touching your skin all lead to depression