That... kind of makes me want to visit this site much less.
I often upvote both sides of a polite to-and-from between two parties with differing opinions, if the discussion is interesting, since that, I feel, adds to the quality of the whole page. I frown upon learning that it is encouraged to downvote if you disagree. Isn't it an equivalent of childish sticking fingers into your ears and hoping the other opinion goes away?