Having made (what I thought were polite) comments on Reddit only to get down-voted into oblivion, I agree that HN has one of the most thoughtful and respectful communities I've participated in.
In my experience, it's pretty easy to misjudge the expected overall level and style of politeness in a given social space. Many people were raised with the idea of politeness being a safe default, but in some spaces being too polite can come off as aloof or condescending.
