> It should be a button to downvote content that doesn't contribute to the discussion, or is spam, or morally bankrupt. I am not sure it's a viable approach.

> It should be a button to downvote content that doesn't contribute to the discussion, or is spam, or morally bankrupt. I am not sure it's a viable approach. If we think a comment shouldn't be there in the first place, reporting it should be the way to go. Then I think a lot of people have very loose definitions of 'morally bankrupt', in that from their POV people in their right mind shouldn't be disagreeing with them. All in all having the upvote/downvote button as "push up"/"push down" button seem sensible to me. If the platform owner wishes people get more exposed to controversial ideas, they can tweak the effect of downvotes or adjust the thresholds of what is highlighted or pushed to users.