sorry just putting forward a possible reason for the complaint not commenting on the right or wrong of it. If it is in an inconvenient place then it should be cleaned up. I am old enough to remember when there were very few rules about dog fouling,and have stepped in the odd turd annoying yes! a disaster no.Human nature being what it is the person told off would have complained to BW about smoke not what she was her criticized about.Just a story that fits there are many others i am sure.
funny how people put a biodegradable substance into a non biodegradable bag, a trowel would be better in many cases.