We ripped out every dado rail when we moved in here - mind you, there was truly horrific wallpaper (in clashing patterns) above and below. That went too.
I agree woth Flickety - wealthy, middling income, poor. Sub classified, perhaps, as she also suggests later, with education level. Haven't thought that one out yet.
Our whole house, indoors, was painted eau de nil when I was a child, with a dingy cream woodwork - apparently these were the paint colours you could get after the war. I have, unconsciously I think, avoided it in my own homes.
We'll (try to) keep the red flag flying here. Might get a bit wet, though.