I'd actually like to see a side-moderation item, open to everyone all the time (limit it to X votes per article, perhaps?) that lets people rate a post with how much they agree/disagree (perhaps going Strongly Favor, Favor, Oppose, Strongly Oppose; a color system would be more preferential to numbers, but then we get into the topic of how colors are seen across various countries...). This way a post can be rated +5 Informative, Strongly Opposed, where someone posts intelligently, uses plenty of (good) sources for their argument, but they arrive at a conclusion that many other readers disagreed with. I call this the Polling (as opposed to the Moderation.)
While this won't stop the most zealous of mods from using Insightful/Underrated/Flamebait|Troll/Overrated as their way of Agree/Disagree, it will decrease that. It will make the groupthink far more apparent, which I consider a good thing: since /. seems to be a more intelligent community overall, if a stance seems to take large approval it will make many take another look at their own views whether they agree or not. It also give a secondary way of filtering stories, so you can go to a story after the modding/polling has settled and see highly rated posts that were Strongly Opposed to get a better idea of the other side. (Alternatively, this can be used to find accounts that are "soapbox" accounts, where some group with a minority opinion on /. makes a post and tells their members, some of whom may have multiple /. accounts to try having mod points more often, to go rate up a post. Someone who only posts in relation to certain topics, like religion, and is constantly rated +5 Informative/Insightful but also Strongly Opposed might be an indication of this.)
And for those of us who love charts, it means you can place a user on quadrant graph in relation to their karma and how often their posts are Approved/Opposed
 I use Favor/Oppose instead of Agree/Disagree because the use of the latter as part of a rating display makes it seem more like the site is the one agreeing/disagreeing rather than the community, at least to me. There's probably a better term than "Favor", though...