That's just a case of us not having seen it. I've responded now. It's not possible for us to read everything that gets posted to HN—there's far too much. 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 (https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu...). You can help by flagging it or emailing us at hn@ycombinator.com.
> Were discussion about Foxxcon suicides equally moderated?
I can't fathom what that has to do with this, but the answer is of course. The principles are the same.
You can always find examples of comments that escape moderation on any side of any sufficiently-discussed topic. People are far too eager to make inferences about moderation bias from what is in fact just randomness.