In my experience, most information is classified by virtue of it being aggregated and manipulated on a classified system. The only way to declassify that information is to have someone laboriously scrub all the data you want to put on an unclassified system and get it approved. if your entire network is classified, there's going to be a lot of mundane stuff there that is classified by default, because securing such a network requires that people can't just take data off of it without oversight.
