We live in a square and one of the neighbours has an ashtray on the porch, it's at the front of the house. The guy stands in the porch and smokes and leaves all the stubs in this ash tray. Can you still buy ashtrays? This isn't a proper one, it looks like an old saucer. Anyway the result is that all the fagends blow all over the square and into other people's front gardens etc making a mess. It's not just ordinary cigarettes either, it's both them and rollups. I've never smelled weed but you never know.
Anyway I'm sick of picking them up. Is it reasonable to say anything or ask them to do it round the back where their garden is fenced?