I think we actually agree. I'm not saying that you should expect something in return when being kind to people. That's not real altruism. I'm more talking abou

I think we actually agree. I'm not saying that you should expect something in return when being kind to people. That's not real altruism. I'm more talking about when someone goes in the other direction and is notably unkind, inconsiderate, cold, exploitative, or otherwise disrespectful to you. That's when it's time to switch to a new strategy. To me, ignoring a neighbor who greets you is pretty cold and disrespectful, but yeah, everyone has a different line when it comes to these things, and it depends a lot on context.