Perhaps a better way to make upvoting/downvoting work better would be to use rules such as some of the ones described on r/NeutralPolitics [1]. Here's the summary:

> Downvoting: reserve downvotes for posts that are explicitly breaking subreddit rules. Do not downvote someone simply because you disagree with them.

> Upvoting: legitimate evidence, solid reasoning, or respectful discourse; Upvote someone admitting that they are wrong. Upvote outstanding use of logic where evidence can’t be had

That seems to prevent - at least in theory - the whole hivemind behavior. You don't upvote/downvote because you agree, but because you see that there's something good about it, whether or not you share the same point of view.

[1]: http://www.reddit.com/r/NeutralPolitics/comments/ptgxf/meta_...