At the risk of being serious for a moment, saying "please" and "thank you" are two of the lowest effort, highest reward, and plainly decent things you can do as a human.
...some of us "other kind" of people actually consider excessive politeness as offensive because it wastes time and pollutes conversations and after a certain we'll start actually being offensive with people like you, and you'll just stare amazed at how horrible people we can be! When in fact we're just snapping unable to put with more verbal abuse coming in terms of "please" and and "t you" from people like you.
Not everyone is relentlessly virtue signaling or karma whoring, whether in IRL or on HN.
All jokes aside, yea... I mean... that's normally beaten into you as a child even if you grew up white trash. I would know.