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?