@Bug-In-A-Jar
I don't actually see in what way that contradicts what I said. I said there aren't incentives to having a high MSB reputation score, beyond it giving a vague indication of, well, your reputation on the board. That's not an 'incentive' in the way I think most people would define one in that context.
I don't think most people particularly like being downvoted -- I never said no one cared. Some people don't, some just find it funny, some probably take it as a badge of honour, some care quite a bit. However, the impression I have is that many or most posters here consider it kind of childish and crappy behaviour to downvote based on the poster rather than the post. Now, if a poster is consistently being an ass, then someone may genuinely be downvoting the posts for content and it may still look similar for a while. If someone or someones enter a thread antagonistically and suddenly almost every post on the side the new arrival(s) vocally dislike(s) has a couple new downvotes, it's not surprising that people will perceive a connection. We can't currently tell if they're right, since the ability to see who downvoted seems to have broken again.
If a poster's opinion is unpopular enough -- or IMO more likely, the poster's mode of expression and treatment of others is unpopular enough -- to get things to where they can no longer downvote*, maybe that person should step back and look at what they're actually contributing. I don't downvote frequently, but when I do it's most often for a few specific behaviours, ones that I frankly think ought to harm someone's reputation.
I'd like to have the ability to see who downvotes what again, but with or without it I think the system has been working both fine and as designed.
* Although I seem to recall you need to get 10 reputation to downvote, I don't actually know if you lose the ability if you fall below that again.