I'm not griping about the stupid questions. The occasional stupid question is forgivable. Everyone asks stupid questions sometimes. But the proper response to being called out for asking a stupid question is, "Wow, you're right, that was a stupid question, sorry about that." Not, "Hey, that wasn't very nice!"

HN is a site dedicated, ultimately, to high-tech entrepreneurship. In the startup world, if you don't do your homework, or worse, if you get offended when someone calls you out for not doing your homework, even if they do it undiplomatically, even if they level actual personal attacks at you, you will lose, and your competition will happily dance on your grave.