Realistically, how much does this matter?<p>During the cold war I worked in the aerospace industry. There were enough artifacts of history and design in the hardware that I always thought that stealing blueprints would be more confusing than looking at photos and doing some back of the envelope analysis.<p>For example at one point the manufacturing people put in a change order that enlarged fastener holes on the blueprint. Turned out that the physical assembly had always had bigger fasteners than the blueprint said. If you stole the blueprints, your copy just might not have worked. There have to be electronic equivalents.