> This completely misses the purpose of the downvoting feature
"Downvote for disagree" has been canonicalized on HN since (nearly) the beginning, by pg himself, back when he used his real-name account to comment. :)
I agree that it has undesirable consequences, but it is fully established.
It's even worse than that. People are all too often willing to "flag for disagree". It's getting to be pretty common to see threads with comments that are [flagged][dead] which don't break the rules in any way, but merely express a view which is unpopular. Sometimes I even agree that it's a stupid position to take up, but that doesn't merit being flagged to death. I always vouch for those comments but it feels like an exercise in futility with so many people using the flag function as a "super fuck you" button.
Personally I would remove the downvote button entierly because apparently it is a lossy projection of an at least three-dimensional vector: agreement, quality, truth. Graying out text so it is no longer readable is a censoring measure not justified in most cases I encounter on HN in the eight years I'm here.