"Please don't post shallow dismissals, especially of other people's work. A good critical comment teaches us something."

"Don't be curmudgeonly. Thoughtful criticism is fine, but please don't be rigidly or generically negative."

"Don't be snarky."

https://news.ycombinator.com/newsguidelines.html

There's plenty of room for thoughtful criticism and skepticism in HN threads, including the present one, but please don't post like this.