] Aviation obsessives with cameras and Internet connections
] have become a threat to cover stories established by the
] CIA to mask its undercover operations and personnel
] overseas. U.S. intel sources complain that "plane
] spotters” hobbyists who photograph airplanes landing or
] departing local airports and post the pix on the
] Internet” made it possible for CIA critics recently to
] assemble details of a clandestine transport system the
] agency set up to secretly move cargo and
] people ”including terrorist suspects” around the world.

This reminds me of a scene from the movie Broken Arrow where the presence of plane spotters nixes a plan to not disclose the loss of a B2 bomber.

MSNBC - No Secrets: Eyes on the CIA