I used to be live and let live, until we had a next door neighbour move in who continually smokes it - skunk I believe, which has a dreadful stink. We can't have windows or patio doors open in summer, and have to get in quickly through our front door because of the stench wafting out of his front door into our house, which faces ours, front doors being on the side of the house therefore facing.
He is the sole carer for 3 early secondary school age children, drives under the influence, is continually shouting at the kids. It is known that passive smoking of cannabis is harmful to the brain development of children. He is continually making dreadful retching coughing noises outside of his door, coughing up whatever the stuff does to his lungs, even in the early hours of the morning (he is of the belief that the stuff is medicinal and good for him,) waking me up. Other neighbours dislike him for his nasty habits as well. However if we were to report him to the police, in the unlikely event they investigate, he will know it was us who reported him.
Sorry for the rant but he makes our life a misery.