I think this is a cautionary tale about using social media while in a bad mood.
Considering how unreasonable he was in that thread, I'm assuming he was just in a bad mood or something like that. Except now he's on the front page of HN with tons of comments criticizing him and painting him as a bad person.
99.999% of people will probably forget this by tomorrow, but it still would suck to be on the receiving end of this kind of attention I think.