My next door neighbours keep using my washing line. They have two of their own lines which are right next to my line but within their boundaries. My washing line starts attached on the wall at the boundary to our property's and crosses slightly over my garden where it is attached at the other end to a concrete post on my property a metre or so inside my boundary.
Being a family of 4 with a lot of washing, they often hang any extra washing that they can't fit on their line on mine.
Disclaimer: I live alone and don't tend to use the line much except for when I wash towels or sheets. My clothes I usually just stick on a clothes horse and put outside the door.
I'm sick of looking outside and seeing their washing hanging across my garden but equally AIBU if I rarely use the line myself and they need that extra bit of space for theirs? 😬