How to know when to take your screaming child out of public place to calm them down? The answer depends on your self-awareness and sympathy for others. If you lack both, then it comes down to how much the community can take.
Big Appled put out this awesome guide on NYC etiquette. There’s a lot of guidebooks and how-to’s for New York, but this one hits many of the right notes, goes deep, and in a humorous way.