Neibours moved in about 4 months ago live in flats, noticed fag butts on my balcony ignored and swept up in the hope it would stop as I like to keep my balcony nice and tidy. Then I notice a few days later it's happening again. So I knock her door really anxious as I don't know this person, they don't answer but could see them through the glass door walking about so they were clearly ignoring me. I then wrote a note politely asking them to stop. Low and behold it hasn't stopped this morning went out looked like they had tipped a whole ashtray out of there window. Really getting fed up now.
YABU : just clean it up and get on with it.
YANBU : time to report her for littering