I never said it's approporiate. I wouldn't want to live next to such house either. But I find it unacceptable that you would like to regulate that away, just like I don't think it's acceptable to regulate whether someone can hang their laundry outside or not. It's a uniquely American fetishism with defining freedom as "freedom to tell others what they can or cannot do". There's a reason HOAs exist pretty much only there and hardly anywhere else. I might find the sight of my neighbour's car unappealing - but you're the one who wants to regulate what they can or cannot do with it.