Comments which you disagree with, are factually wrong, or are refuting your point, provided they are relevant to the discussion. My reasoning here is that these

Comments which you disagree with, are factually wrong, or are refuting your point, provided they are relevant to the discussion. My reasoning here is that these types of comments provide discussion points, which is why this sort of linksite exists. upvote == agreement can lead to boring groupthink, instead of interesting and informative communities.