I was fooled by a troll yesterday. (Then people started docking ME points! Oh, the injustice! ;) )

Anyways, the simple up/down voting seems to reward trolls with lot's of attention (negative points) and prime real-estate (bottom of the page). Instead, why not add a "fader" where a couple of "fades" will turn trolly comments grey then white...

No social news sites I can think of are playing around with multi-dimensional voting of any sort...is there some good reason why not?

Would you consider Slashdot to have "multi-dimensional" voting, given their Interesting, Insightful, Informative, Funny, and (of course) Troll ratings?

It seems to have worked well enough there.

I haven't looked much at Slashdot lately, but they have certainly put a lot of work into designing a good system for moderating comments. You are right that they have some dimensionality, and a way to "fade" trolls by adjusting your settings so you only see highly rated comments.

Still, for me at least, I don't find their dimensionality very helpful. "funny" and "informative" are rather broad categories. If all the content on Slashdot could be simultaneously ranked on a scale of "value to startup entrepeneurs looking for seed funding" and "online video content"...that would be useful to me!

I don't have any particular ideas about what should be done, but limiting your choices to "up" and "down" seems so narrow. Maybe I should jsut be happy it works as well as it does!

I was interested in this topic, namely, conversation theory or something with that sort of name, and read a little on it. Standard textbook stuff you can find in intro level linguistics or sociolinguistics.

Slashdot's model follows some theories surprisingly well. The designers really put thought into it.