It's much more likely it was removed for some unrelated reason (flamewar, spam, or just a mistake - btw you can email the mods if you think it was a mistake, it

It's much more likely it was removed for some unrelated reason (flamewar, spam, or just a mistake - btw you can email the mods if you think it was a mistake, it seems they're very responsive) HN is full of discussions on these matters and I've never seen them get removed. And you can always use Archive.org's Wayback Machine to periodically save the page.