It's unfortunate because it leads to the impression of a "strong negativity bias", which is true in a Cunningham's law sense but gets complicated because people also negate the negativity: https://news.ycombinator.com/item?id=16677130. It's quite typical for top comments to be objections of the form "I can't believe the comments here are so negative!"

The contrarian dynamic is particularly visible in political threads: https://news.ycombinator.com/item?id=15701584.