True, “Karma” doesn’t mean much unless you can refine “Karma” statistics, e.g. upvote/ downvote ratio, “karma” trend against time graphs, last 30 days net “Karma”, filter “Karma” statistics specific to community/instance.
Still, you can’t stop someone from selling a 5 million “Karma Points” account to trolls, so I disagree with showing “Karma” like Reddit.
Part of the reason is internet commentators are so mean to each other, and many of us users don’t want to be judged by someone? (Although extreme echo chamber is also a bad thing)