Comment by makeitdouble

> In the adult world, you'd just call the police.

We deal with a lot more conflict than you're accounting for.

Someone can be shouting at a waiter at a restaurant and people around will try to deascalate and help or consolate the waiter.

Af short fight breaks ? People close enough to the participants will act, and bystanders might stay as witnesses to not make it a "he said she said" situation etc.

In general people aren't playing heroes but will do a ton of small and cumulative effort to make tensed situations not expand further into chaos.