In 2020, Dang said [1]
> Voting ring detection has been one of HN's priorities for over 12 years: [...]
> I've personally spent hundreds of hours working on this, as well as tracking down voting rings of every imaginable sort. I'd never claim that our software catches everything, but I can tell you that it catches so much that I often go through the lists to find examples of good projects that people were trying ineptly to promote, and invite them to do it again in a way that is more likely to gain community interest.
Of course this sort of thing is inherently heuristic; presumably bots throw up a smokescreen of benign activity, and sophisticated bots could present a very realistic, human-like smokescreen.
There are all sorts of approaches that a moderation team could take if they actually believed this was a problem. For example, identify the users who regularly downvote/flag stories like this that end up being cleared by the moderation team for unflagging or the 2nd chance queue and devalue their downvotes/flags in the future.
I think the biggest thing HN could do to stop this problem is to not make flagging affect an article's ranking until after a human mod reviews the flags and determines them to be appropriate. Right now, all bad actors apparently have to do is be quick on the draw, and get their flagging ring in action ASAP. I'm sure any company's PR team (or motivated Elon worshiper) can buy "100 HN flags on an article" on the dark web right now if they wanted to.
This just describes HN as a whole, so if this is the concern, might as well shut the site down.