Problem is, in healthy societies, what you define rude is called normal.
Oh, my. So rude behavior is normal? Civilization was based on manners, consideration for others, respect for boundaries, and perhaps most important, resonsibility. Otherwise, we're just savages with high-tech gadgets. I don't call that "healthy" at all. I call it "pretty darned sick."
LOL! Name three societies in which it is considered "normal" to allow one's children to run amok and disturb others in public.