No, that's certainly not the case.

If you see a post that ought to have been moderated but hasn't been, the likeliest explanation is that we didn't see it. You can help by flagging it or emailing us at [email protected].

https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu...

The other thing, though, is that views differ about how such comments should be classified. What seems like an outrageous "general attack" to one reader (especially if you feel passionately about a topic) may not at all land that way with the rest of the community. For this reason, it's hard to generalize; I'd need to see specific links.