Good write up about average public behavior and interactions.
May I suggest in the future if you write similar articles that you take a moment to also include cultural differences and what is expected? It doesn't have to be broken down by countries. Just a tiny tidbit saying that just because something is socially acceptable in your country, doesn't mean its the same elsewhere.
For example here in the states its considered rude to slurp when eating a soup / broth. In Japan it's actually a sign that you are happy and content with your meal.
RE: How to act (behave) in public