My neighbor (male, mid-sixties, well off, entitled) also has a problem with me hanging out my laundry. I actually don't hang out underwear, but he's offended by sheets, towels, t shirts, and trousers. My solution? I use the side of the clothesline closest to his house FIRST, every time, especially when I wash all the dog blankets. Someone has to save the planet for his grandkids. It won't be hiim.