From the Federation of American Scientists' Secrecy News (http://www.fas.org/sgp/news/secrecy/index.html) for 26 August 2003:
QuoteCLASSIFICATION HUMOR
National security classification policy is not known as a source of
many laughs, for at least a couple of reasons. When it is
legitimate, protecting classified information from disclosure can be
as serious as life and death. Besides, legitimate or not, the
discipline of classification has a soul-deadening quality that
discourages independent thought, let alone whimsy.
But one anonymous critic whose whimsy could not be completely
suppressed produced this mock set of classified information cover
sheets, modeled on the official versions discussed above. See:
http://www.fas.org/sgp/othergov/coversheets.pdf
These cover sheets would be appropriate for much of what is taught at the Department of Defense Polygraph Institute (http://www.dodpoly.army.mil).
;)
I can think of a few other organizations and agencies that could fit these into their program quite easily :D