Nope. Literally the first rule of HN moderation is that we don't do that—i.e., we moderate stories less, not more, when they're negative about YC or a YC startup. Also, we were slacking this afternoon (where by slacking I mean hacking on an arc compiler) and had no clue this thread existed.
It set off the overheated discussion detector (a.k.a. flamewar detector), which lowers the rank of a thread. We do turn that penalty off for particularly substantive discussions—which, though this may surprise you, I'm not sure this one is. Not every Reddit drama shitshow is uniform in its excellence. Can I say that without evil catnip effects?
Edit: ok, we've reduced the penalty and changed the title to something the post actually says. (The submitted title, "Reddit CEO admits to altering user comments that were critical of him", breaks the HN guideline about not changing titles unless they are misleading or linkbait. Please don't do that when submitting here.)