My grandma lives in a ground floor flat/maisonette. The way the flats are designed, everyone has a backdoor and a front door, including the upstairs.
My Grandmother's hallway is very dark, but it has a window quite high up to let light in.
The window (and ledge) is also on the wall where the upstairs flat access their back door.
Upstairs have piled up a load of cardboard boxes, bits of wood and general junk on this ledge blocking her light.
She wants them to move it, because her view when she looks at this window is junk.
Neighbours upstairs say it's on their stairs, so she doesn't really have a say in it, they can put what they want on their stairs..
Just thought I would get aibu for a second opinion!