Is it true that a social media platform that allows anonymous downvotes has the potential to become a toxic environment? - eviltoast

Should social media platforms only allow upvotes or favorites?

As I understand it, Kbin doesn’t allow downvotes just like Mastodon. Users can only mark a comment or OP favorite (upvote) and the Kbin user can see what account favorited / upvoted their comment or OP. Also if it’s from a Lemmy user by the way.