It doesn’t matter if the most upvoted comment is pro or against subject in discussion. All that matters is bolstering a comment that is minimally compatible with participant’s thinking and making it win against the opposite argument (competing and most voted one).
So it seems that the most satisfactory comment (for most readers) doesn’t really matter at all. What matters, before anything else, is visibility of an opinion that somewhat aligns with one’s thinking, rather than writing or finding the most corresponding comment for that subject, fully compatible with reader’s perception.
so keeping tabs on posts by quickly downvoting/upvoting (in)convenient subjects, as well as slightly steering them away from what’s really being discussed, might be a pretty handy tactic for manipulating course of conversation, and also making them look like not sufficiently valuable or important to be worth one’s time?