The home page already has a massive bias in favor for pretty much any kind of negativity, but doubly so for anything involving a tech company. It doesn't matter whether the stories are untrue, unverified, repetitive, etc, they'll still get voted up, and the comment threads will half full of low quality complaints repeated from past discussion, often only tangentially related to the submission.

And it creates a very visible feedback loop, as users start to think that this is what HN is supposed to be. They're probably the biggest quality problem of HN.