It was addressed by dang in an earlier Ask HN: https://news.ycombinator.com/item?id=33950747

"They're already banned—HN has never allowed bots or generated responses. 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!"