For what it's worth, if you click it but don't have enough karma, it is recorded and high-rep users can see how often people tried to up/downvote something and

For what it's worth, if you click it but don't have enough karma, it is recorded and high-rep users can see how often people tried to up/downvote something and compare it to the actual votes. But the screen (I have enough rep to see it) seems to be more of a gimmick than actually used by anyone.