Do you think it would make sense if forums like hackernews/reddit/etc.. would have two sets of upvote/downvote buttons?
The first set would be used as a "contributes to discussion - vs - does not contribute/flame" indicator, while the second set would be used for "I agree/support this view - vs - I disagree/don't support it".
The usage of the voting at the moment seems a bit unsymmetrical, the up button is usually used to show support of the argument, while the down button is used, correctly the most times, to indicate a comment that is inflammatory/troll or doesn't add anything to the discussion.
Basically pressing either agree or disagree is also saying that it contributes to the discussion. Clicking inappropriate is the same as downvoting as it is now. Finding the right terminology might be difficult.
I'd love to see this as an experiment to see how it changes the discussions here.