https://news.ycombinator.com/newsguidelines.html
We put a ton of effort into counteracting abuse and manipulation on HN. Obviously we don't know if we're catching it all, but we catch some. What's also true, though, is that users imagine all kinds of sinister things based on no evidence or data. Disentangling these two problems—real abuse and imaginary abuse phantasms—is not so easy.
Don't forget that randomness always looks like patterns intermittently, and if you live in a world filled with astroturfers and spies, you're likely to interpret those patterns in a sinister direction.
But what exactly are your observations? Two trends I observed this year: for a while, every other post was a link to the nytimes, and now we've seen M1-related threads on the frontpage every day (?) since the day of the announcement (I may be over-dramatizing here). Other than that, business as usual?