What?
I don't get it. What is it got anything to do with censorship or free speech at all, one can flag for the sole (and simple) reason of disagreement of rewards, imho it's completely justified for some one to flag shitty content (case in point). If someone loses "visibility" and rep over that, and feel "censored" , it's just a natural consequence of posting shit and winning rewards for the said shit that several other users don't necessarily deem fair.
Edit : self upvote for visibility