Sometimes I wish there was more of an upvote/downvote system like Ars Technica uses. Posts that get a lot of downvotes get hidden (but not deleted), and anecdotally I think it tends to bury a lot of the less useful and most inflammatory stuff.
Ug, please no!
In a perfect world, where people can behave like civilized beings, I might agree with you but in todays polarized world I would hate to see every single Tesla post buried in virtue signaling disagree hell. In this scenario, little mobs of as few as 10 members, could try and control what gets seen. In most threads 5-10 disagree votes could bury otherwise completely valid posts that don't fit certain narratives.
I think the way we have it now works well. Emoji reactions act as unofficial polls for each post. The virtue signalers are easy to spot along with people that simply disagree (or angry) certain members posts as a troll. Otherwise, one is able to register their opinion in a way that doesn't really mean anything.