Comment by jotjotzzz

Basic human ettiequte and decency is taught at home, at schools, and within the culture of society (e.g., Mr. Rogers neighborhood or Sesame Street on TV). I do notice that countries that have serious overcrowding, like mainland China, India, and probably other third-world countries, just do not bother or have no access to, or maybe just plain don't know any better.

I don't think this has anything to do with the lack of travel experience. It's just the way that they were brought up and perhaps in their village or town it's just like that.