This isn't censorship and I think that word gets thrown around much too loosely.
If there are multiple people in the discussion then it is very likely more than one will pass the threshold to vote. If there isn't then nothing of value is lost as you still get to make your comment to the other side, you still get your last word in, it is just not public and the conversation will die immediately. Much how it is now if the other side doesn't reply to you.