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.
This looks like two posts I saw quite a while ago where contrarian posts were also intended to be up-voted. I can't seem to find those posts (searching for contrarian doesn't match anything and searching for 'vote' is obviously useless). Nonetheless those posts urged to mark each contrarian comment to clearly indicate the opposite voting semantics to avoid unsuspecting readers being misled by the votes. Maybe someone can provide the links?
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.