I concur with the value of keeping meta-discussion on HN to a minimum, but sometimes it really surprises me when a story gets killed.
At one point, you could object by commenting in the thread under an existing comment. That often caused moderators to reverse the kill if a legitimate point about relevance was raised. It seems this has been disabled.
This came to mind today when I noticed that the stories of recording studio engineers about the experience of working with Michael Jackson, about his work ethic and management style, was killed after 77 points [1].
If anything, that set of stories is the very most relevant, and definitely the very most interesting, of all the things about Jackson that have been posted here. The stories are told from a very 'hackerly' perspective, and the peripheral environment of the stories -- recording studios and the related technology and business environment -- are interesting to many people in this audience. The comment thread had some interesting tidbits, and looked in no danger of going astray. And as a point of comparison, I very much doubt that a much less interesting or timely 400 word blog post about the "value of a strong work ethic" would have been killed on HN.
Anyway, this is all just peanuts in the long term for HN, but it seems we should work out a way of raising a legitimate objection to a moderator kill without resorting to an 'Ask HN' comment such as this.
[1] http://news.ycombinator.com/item?id=685603