Down-voting can be used as censorship, if not used properly. As in downvoting because you don't agree with the opinion, rather than because the post is irreleva

Down-voting can be used as censorship, if not used properly. As in downvoting because you don't agree with the opinion, rather than because the post is irrelevant, ad-hominem, or content-free. If you don't agree, post a rebuttal.