If the boxing game promised fair competition (censorship resistances) but the rules encourages other forms of behaviour (whales turning day into night) then surely those who invested their time and effort into the game, or in this case created content, have the right to speak out?
This is another submissive argument that's been posted: you didn't put any money in/you are getting more out of this than Facebook so don't complain. It's quite counterproductive because it suppresses constructive discussions.
I spent quite some time about working out how to implement a fair and accurate reputation system, and one of the things that I worked out was that downvoting should not be permitted. Post a post instead saying how crap you think they are, see how that goes? Makes you realise what a dumb idea it is after all.
In my humble opinion, upvotes cost money, downvotes lower the poster on YOUR feed. Whoever you upvote, their downvotes lower the poster to the degree you upvote them on your feed. Downvoting should just be shunning, not actual punishment. Votes should be irrevocable.