But I remember a story about a 3rd AD 2nd Lt. that used open source material to compile his unit's history, showed it to his CO who in turn showed it to his CO.
That CO showed it to brigade and then Division, some where along the line it got classified, and early example of open source data mining.
This may actually be what has happened.
But I believe more in the idiocy of the powers that be more than a conspiracy.