greet random people you meet on the streets in the US
I guess, it really depends where you live, but mostly yes, everyone does it here to some extend.
When someone looks at me and I notice it, I would look back at them and say Hi or something. That is widely accepted “custom” by everyone in a community, at school, work etc.
…Just a simple way of politely acknowledging the other person.
I can tell you didn’t grow up here.
Edit:
But don't do it the "polish way" like you wanna start a conversation or something... That's strange.
well it's kind of hard to explain... don't do it if you don't know how... whatever. forgetit.