The HN moderators have said that machine generated comments are not welcome on HN: "They're already banned—HN has never allowed bots or generated comments. If we have to, we'll add that explicitly to https://news.ycombinator.com/newsguidelines.html, but I'd say it already follows from the rules that are in there. We don't want canned responses from humans either! ... " (https://news.ycombinator.com/item?id=33950747)