In a really big and busy city it's emotionally exhausting and not reasonable to have an interaction with everyone near you. The only way a lot of people can tolerate being packed into busy public transit systems on a daily basis is to intentionally ignore each other to a certain degree.

It's essentially the same unspoken etiquette rule as what you're socially expected to do if riding a crowded elevator.

Go commute by NYC subway 10 times a week, M-F especially during peak tourist season and you'll understand.

I intentionally behave completely different if I'm in a small town of 3000 people or walking down the street, shopping, riding transit in a large city.

I remember in the 70s and 80s people on buses and subways reading magazines and newspapers. The idea that electronic devices have ushered in some age where humans want to interact with each other less is a myth I think.

I don't think that's it. I think highly anti-social behavior is often deliberate, looking for someone to challenge you. An exertion of power. That's why pretty much everyone learns to ignore the behavior and not say anything.

The only interaction you’re missing in ops post is politely asking them to turn it down and being told very aggressively to “shut the fuck up!”.

Sure, in the same way that taking a leak in a toilet and taking a leak on the sidewalk are both ways of avoiding wetting your pants

As is driving alone in a car

Newspapers have probably been used for this on subways for this as long as subways have been around. Walkmen in the 80s.