Minding one's manners in public is such a big issue. It has something to do with respect and self-respect. You must have had some of these experiences that annoyed you: Someone enters the lift(elevator) or a small room right after smoking, without getting rid of the strong smell. When commuting on the metro, the person standing next to you is hearing loud music even with his headphone on. Someone who uses a mobile phone and talks on public transport, i.g. a bus, forces you to hear his private matters such as health, or family argument. Why are some people so inconsiderate about others? Do you want to be one of them?
In this section, the readings/articles are good reminders of how to behave in public.