I'd thought about it too earlier but then I said 'what the ...' it's OK :) why bother ourselves with trivial stuff. There are many answers that we think should get the BA but they don't. Most times people give a BA to answers that they are opinionated on and is answered the way they think is right.
If any question is not inline with the site's policies then it gets removed and so does all references to it which results in losing points too that way those who are concerned about their points continue answering more and more which keeps the site alive :D and also that it indicates that even while answering one had better keep the policies of those who created this platform in mind.
I believe that if the QA changes the BA the last BA loses the points gained too. Am unsure but I think it's that way.
Wow I never noticed that before, that kinda blows.