I know most people don't hang their laundry outside anymore, but I had always thought it was just b/c they're lazy.
It saves a ton of money and energy, but people are too concerned with their own vanity ("it looks trailer trash") to tolerate. People objecting to the sight of someone else's undergarments is very Victorian. (Look away, then.) The fact that people object to laundry-hanging is pathetic; shows that people are not willing to alter their lifestyles in the slightest for the environment.
It's kind of hard to look like trailer trash when you live in a house. Really the only thing that is "trailer trash" is a dilapidated trailer. Not everyone can afford to live in a house (or buy a dryer) so way to put down people based on their income. I think McMansions are pretty trashy, for invading someone else's neighborhood and then complaining about things that were there before they were.
Housing associations are the main opponents of laundry hanging, of course. Do they actually do anything useful, or do you just pay them to tell you what to do? Living in a place like that is kind of like taking corporate America home with you. They should at least pay your electric or laundromat bill if they're forbidding you to hang up your laundry.
I don't understand some of the things that are important to people: putting pesticide in your yard just to have uniform grass, insisting that women remove all their body hair, caring what your neighbor does on their own property. For fuck's sake. I live next to a bar and have to put up with motorcycles and drunks at 2am. Grow up.