It breaks the site guidelines to post insinuations about brigading. Internet users are much too quick to project that (or astroturfing, shilling, etc.) into comments they dislike. Please see https://news.ycombinator.com/newsguidelines.html and https://hn.algolia.com/?sort=byDate&dateRange=all&type=comme...

You're right, of course, that off-topic shallow dismissals are bad comments for HN.