I was thinking that OP was describing a situation [Post receives many upvotes and many downvotes] and ascribing the half he disagrees with to some kind of fake votes (sockpuppetry), while those who agree with him are depicted as being the genuine opinion of LW posters.

Which, if true, that's bad, but don't you sort of have to establish that? Like, isn't the exact opposite equally likely? Alternatively, what if all of votes are "genuine" (that is, represent different LW posters), or alternatively, are all false (that is, dude and some opponent are butting heads through false votes)?