I saw this on skyblock you can rate people's post on moderator application which is useful because sometime u agree or disagree with someone but ur too lazy to post something but with ratings u just gonna rate the post!
No Support, this would lead to chaos. "No support, you don't follow the requirements. -> He disagrees with your comment."
Though, if used properly it would be good to be able to "agree", "disagree", I can't actually see it working effectively at all.