Re "spam CPC accounts", concoctions like that are also a cheap-and-rather-silly thing that internet users come up with when they don't like what other internet users say. It's common, poisonous, and inevitably so vacuous that we have a site rule against it- see https://news.ycombinator.com/newsguidelines.html.

If you had evidence of abuse, you should be emailing it to hn@ycombinator.com so we can look at the actual data. Comments expressing views that go against your own views is not evidence of abuse, it's merely evidence that divisive topics are divisive, which we all know already.