> I suspect that a lot of the nice behavior on HN is because, for the most part, people value the community, and consider this a "professional" environment, and it's not a bad idea to play nice in places where employers/ees can see us show our butts.

As I work in dysfunctional industry (enterprise software development), being professional would ruin a lot of the fun of being on HN, as I would have to parrot their dysfunctional beliefs... Hence, I always write from anonymous accounts and decomission them often to make sure I'm not doxxed.