Lesson 7: your noisy children are entitled to sit in the train's designated "Quiet Coach"

Because the "Quiet Zone" is to avoid all those pesky people with obnoxious ringtones who get calls every five minutes, and people who like to turn their MP3 players up ridiculously loud, despite their tinny earphones. Or even youths who insist on playing poor-quality MP3s out loud on their phones. It doesn't mean the coach is meant to be generally quiet. Just ignore those angry-looking people who keep glaring at in your direction. Nobody expects you to keep your kids quiet - that would be completely unreasonable. If they have a problem, they can always move to another carriage.