Theoretical question. Obviously if I do something with the covert expectation that something will be done in return, then I get upset about it, It is a covert contract. But what if I am truly outcome independent?

Example. I walk down the street and say hello to a stranger walking by, expecting they'll return in kind. I really do this to be pleasant, I don't get upset if they don't respond. It won't stop me from greeting the next person either. I may judge them for not responding, so you could argue this isn't completely outcome independence.

Where is the line? Does it even matter?