Leaning disagree. The best argument I've seen for anonymizing it is having that information appropriated by corporations. Which admittedly they could just gather from your posts if they wanted to.
I personally think making people explain why they downvoted something is more conducive than just....being dogpiled with no explanation. This is not to say confronting someone in an emotionally charged manner is a good thing to do, but if having to downvote out loud makes people think twice because they don't want anyone knowing they disagree with X, maybe that's a good habit to reassess. That and it's legitimately made me analyze whether I'm only doing it to be a dick