It isn't ok to insinuate astroturfing, shillage, etc., in HN arguments. This is in the site guidelines: https://news.ycombinator.com/newsguidelines.html. Please don't do it here, regardless of how much people are doing it everywhere else.
If you have evidence of abuse, or are worried that it might be happening, you can email us at hn@ycombinator.com and we'll take a look. Obviously, if we find abuse we'll deal with it. But not without looking at the data.
What's not ok is to cheaply invoke these categories because someone holds different views from you or posted a bad comment to HN.