"Comments" by Alan Jacobs https://blog.ayjay.org/comments/ "90% of those who comment do not read your post at all: maybe the title reminded them of something they want to say on a related or semi-related subject, or maybe they’re just hanging out with other people who comment and you have nothing to do with the occasion." Absolutely blistering, and largely true in my experience. Especially true of Hacker News comments.