We've never used a dryer. The only time I used a dryer was the few times I did laundry at college instead of bringing it home. It's pretty common around here, I think pretty much all of our neighbors have a clothes line, although it's usually in the backyard. But, it's not unusual to see people hanging clothes in the front either. I don't see why I would be offending by seeing someone else's clothes flapping in the breeze. They're outside for a couple hours, and then back in the house, it's not like they leave them out there all day.
In my neighborhood, not many people have their own machines, most people use the laundromat, but they charge an insane amount for the dryers, so a lot of people use the washers, then bring the clothes back and hang them up on a line. Saves energy, saves money, and it's clean clothes! I'd rather people hang their clothes up outside so they can wear clean undies than have them walking around in stinky dirty undies.