That content which is being blocked is anything that is classified — but once something is published publicly how can it still be classified?
I agree completely with Mr. Brooks. I'm just guessing the reasoning behind this has to do with the Army's definition of classified. To the Army, just because a bunch of people know something doesn't mean it isn't classified. I'm guessing that's the way it is with a lot of stuff there, but I digress.
That said, this is just plain silly. Restricting access to what are essentially public documents at this point isn't realistic. I think it also fails to recognize that (right or wrong) the public knows about this stuff. The genie is out of the bottle on this one.