I won't post links to examples here because, again, that is probably not within the site guidelines. But I'm happy to supply on request.
Outside that extreme sort of comment, though, the problem is not as simple as it sounds, or feels, because there's no consensus on how to define or interpret these terms. That means any particular moderation call is going to end up feeling wrong to a sizeable subset of users—good-faith users, not bigots or trolls. Put a few of those data points together and pretty much every reader is going to find a pattern to dislike. It's literally impossible to avoid this, even if we could see everything.
One consequence is that we/I regularly get lambasted with every horrible label that exists in polite society (a clarifying example: https://news.ycombinator.com/item?id=22941387), because most people misinterpret a sequence of bad-data-point experiences to mean "the mods must agree with and support this kind of thing".
I wish I could get across to people how these perceptions are unavoidable given the stochastics of the site (HN is a statistical cloud) and how our brains deal with randomness (by strongly overinterpreting it). I've been writing about this for years - a lot of which shows up in these links: https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que... and https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que... - but it doesn't really land. Even if one knows these things intellectually, it doesn't change how they feel, and the feeling determines everything.