"Don't feed egregious comments by replying; flag them instead." - https://news.ycombinator.com/newsguidelines.html

a.k.a. please don't feed the trolls. In egregious cases (like this one) you're certainly welcome to email us at hn@ycombinator.com. But for sure please flag the comment (see https://news.ycombinator.com/newsfaq.html#cflag for how to do that)