Now that there's the karma toll, using downvotes to mean anything other than ‘I don't think this comment or post belongs here’ is a bad idea. Also, now we have poll syntax.
I'd want to vote comments in this thread according to whether they're interesting or boring, regardless of whether I agree with them.
This could have been done by each commenter creating a poll in the comment, leaving normal voting for interest.
As per a recent comment this thread is meant to voice contrarian opinions, that is anything this community tends not to agree with. Thus I ask you to post your contrarian views and upvote anything you do not agree with based on personal beliefs. Spam and trolling still needs to be downvoted.