so on one hand the dept of us justice tell google to stop recording peoples personal details, on the other it tells google (youtube)to hand everyones personal details to viacom?

would be even more annoying if spelled: agnatomisation_
but for lack of a spellified Donner 
owning up to anonymousation,
anonymisaton will have to do...
Not a cursor was swearing
Not even a mouse
I anathematise on me 
demographer's grave!-)

They want it for it's marketing value, pure and simple. They need to have enough time to mine it and extract all the possible marketable value from it before they delete it. This doesn't have the slightest to do with protecting people's privacy...it has to do with exploiting the fact that your users have no privacy.