It breaks the site guidelines to insinuate that behavior you disagree with must be astroturfing. Please see https://news.ycombinator.com/newsguidelines.html.

I realize it's a very persuasive-feeling impression. It's increasingly the first thing people bring up to account for disagreement, but that is a huge problem. Overwhelmingly the real reason for disagreement is that people just disagree, and we get nowhere by pretending otherwise.