Please don't break the site guidelines like this. If you have evidence of abuse, you should email it to hn@ycombinator.com so we can investigate. In the meantime, please stick to this rule: "
Please don't post insinuations about astroturfing, shilling, brigading, foreign agents and the like. It degrades discussion and is usually mistaken." Groundless speculation about manipulation is basically the most common weed growing on internet forums, it nearly always turns out to be a function of cognitive bias (e.g. people see posts they don't like and conclude that their enemies have the run of the place), and it makes for tedious, low-quality discussion.
https://news.ycombinator.com/newsguidelines.html
https://hn.algolia.com/?sort=byDate&dateRange=all&type=comme...
There are many past explanations (some very in-depth) of why we moderate HN this way. Here are some:
https://news.ycombinator.com/item?id=27398725
https://news.ycombinator.com/item?id=26652363 (<-- Mini-FAQ)
https://news.ycombinator.com/item?id=26637365
https://news.ycombinator.com/item?id=27397695