Earlier quoted context omitted.
People are trying to increase the potential customer base of the author by pointing out where there is room to improve. That is incredibly valuable, and one of the major reasons to do a Show HN. That is not being a "hater".
https://news.ycombinator.com/item?id=42150219 was highly constructive. It was direct and actionable. kojeovo's original comment was less so. When you build a product, you're going to get random, in-actionable comments from people who just like to complain. Separating the signal from noise is difficult, and while there is a underlying concern about privacy, not giving anything actionable moves it towards to the noise…
Neither are "haters", though. And, speaking on quality of feedback, "ignore the haters" seems fairly low.