By absolute user count I'd definitely expect most to not have it but only because most accounts aren't regularly used (many even abandoned).
Not saying it shouldn’t be this way, but downvotes are heavily biased toward people who regularly post or comment.
I think you underestimate how little some of us have to say.
Open to abuse? Potentially, but so are a lot of community voting features, and reliably muting serial trolls would be a useful feature for a lot of social sites.
The main issue is that if a comment gets downvoted when newly created, it looses almost all visibility (gets shown further down), and it mostly dies, just from one downvote
This just creates and echo chamber where only the most accepted/mainstream opinions bubble up
It would be nice if we could “sort by controversial” or “sort by new”, so that we got more variety of opinions
Not advocating that, of course, and it feels contrary to what the benevolent mod team would prefer. And I assume that the site has some countermeasure for that, like it does against upvoting a submission that you accessed via direct link instead from from the main site?
HN is lucky in this regard; there is just one HN, not uncountable “sub-HNs”.
Of course people can still come from other places to HN. But to earn downvote privileges here you first need some amount of karma. So hopefully this makes it so that downvote privileges on HN are mostly handed to people who are at least somewhat aligned with the broader community here.
50 inauthentic upvotes for something no one likes, while hundreds of frustrated potential downvoters fume. Then someone puts up a reply designed to be upvoted as a proxy for the lack of ability to downvote the inauthentically boosted comment, and that reply is quickly deleted as trolling or a personal attack.
Showing the total number of views like Twitter does now is a positively-vibed kludge for people who hate the whiff of negativity, although all of Twitter's stats seem wonky as hell under new leadership. Still, a low upvote/view ratio can also represent indifference or people not believing they're qualified to comment on something, rather than being a great signal for disapproval.
So you can still game that pretty well by Gish Galloping with a ton of broad references (entire papers or books rather than passages from them or reasonable summaries), and lots of people will disqualify themselves from downvoting because they aren't going to click through to the papers, while others will upvote just because it looks like the commenter is making an effort.