It doesn't do Anything to the hidden dislike count! Restarted Firefox, nothing. Restarted with adblocker disabled, nothing.
edit:if run in private windows is on it alternates between "dislike" "0" and the real number upon initial page load. If you go to a diff tab and come back it changes by itself right in front of your eyes to one of the other two. Once it randomly goes through all 3(by switching tabs) and changes to "0" it stays there. If u refresh same thing again. Then if you vote up or down(down does not change the # and up does) then refresh, it will ALWAYS be "dislike" and stay there until you remove your vote. Then everything starts over. I wish I could send a video of this, it is crazy lol.