If you're known to be a regular user of a forum, then when someone says something about you and you don't reply, it reads as a tacit admission that they're correct. And when you write essays people say all kinds of things about you. The combination is a disaster. Forum users can sense that you're compelled to respond, and it encourages them to pick fights with you.
Back when I used to moderate HN, hitting publish on an essay was usually followed by several hours of saying various forms of "No, what I said was..." Life is much better now that I never look at the HN threads on them.