Click your username at the upper right:
Turn on "showdead": showdead: yes. (defaults to "no")
There are a number of dead posts in this thread. I'd post some here (some of which don't appear to violate any HN guidelines, I'll note), but probably those same moderators would kill this one, too.
The vast majority of comments on political/social topics fit your description. If you're thinking of the one I'm thinking of (not mine, if it matters), I can't think of any reasonable test that would conclude "this should be dead, but all those others can stay."
Edit: it's bigbacaloa's
Correction: delete the "would like to"
Also, comparing this to Reddit is sort of Godwin's Rule transposed to a different domain. "Better than a poke in the eye with a sharp stick" is pretty much what you're saying.