The "who one-upped this" button

[littlelum]

You know that button that lets you see who one-upped a particular post? Since it is turned on by default what is the point of having the button? I you don't want to have it on, you have to manually turn it off on every post you come across, and by that time you already seen who one-upped it. So isn't being able to turn it off kind of pointless? Why not just get rid of the button and have it show by default? (Another option is to have it off by default, but that was how it originally worked and then it was changed to the current version)