Sometimes, you just know that you were the player who personally turned an enemy into a gold coin. I suggest that the last player to successfully defeat a gold coin prior to or during their final login should get a knockout blow point.
It would be fun to know generally how many players you have whipped and demoralized.
Obviously, players leave for a lot of reasons so this would clearly not be a very scientific stat but it would be cool for personal info and bragging rights nonetheless.