Sorry about the delay in responding ... I don't consider upvotes/downvotes by themselves to be moderation or censorship. That's just non-verbal communication.

Sorry about the delay in responding ... I don't consider upvotes/downvotes by themselves to be moderation or censorship. That's just non-verbal communication. However, when an upvote or downvote system hides a post or promotes a post, then it's censorship, because promoting a post necessarily hides some other post.