You can't have accountability and anonymity. There are people that post, not just upvote, garbage all day long. There's also plenty of occasions where people have been shamed for past posts in completely unrelated threads. I don't disagree with those things being public, otherwise we might as well use Pastebin, but we don't need one more way to judge people. It's also the simplest of acts. I've upvoted right-wing posts before but not because I agree but because they were making valid points and not resorting to personal attacks or demagoguery.