Time and time again, Slashdot's voting system shows that it's superior to these simple up/down voting systems. Not all up votes are equal, nor are all down votes simply because you disagree with the content.
I, and I'm sure many others here also, am unfamiliar with SlashDot's system. Could you point to a summary? Perhaps simply edit your comment to include one.
"Randomly selected moderators assign points of either −1 or +1 to each comment, based on whether the comment is perceived as either normal, offtopic, insightful, redundant, interesting, or troll (among others)."(Wikipedia)
