Wasn’t that basically the intention behind the Upvote and Downvote systems in Lemmy, StackExchange/Overflow, Reddit, or old YouTube? The idea being that helpful, constructive comments would get pushed to the top, whereas unhelpful or spam comments get pushed to the bottom (and automatically hidden).
It’s just that it didn’t really work out quite the same way in practice due to botting, people gaming the votes, or the votes not being used as expected.