I don't have the links handy, but it's well know that mail has been photographed for years and it seems likely that PRISM or some gov database is already ingesting this information. Seems like an easy step to upgrade the camera to something that attempts to scan contents.
“In the past, mail covers were used when you had a reason to suspect someone of a crime,” said Mark D. Rasch, who started a computer crimes unit in the fraud section of the criminal division of the Justice Department and worked on several fraud cases using mail covers. “Now it seems to be, ‘Let’s record everyone’s mail so in the future we might go back and see who you were communicating with.’ Essentially you’ve added mail covers on millions of Americans.”
Just have to photograph them at higher wavelengths. 390-700nm is fine and all, but somewhere around 10nm or so should do the trick...
Perhaps there could be a market on SR for little pieces of x-ray sensitive photographic film. Customers could pay providers a slight premium to include the film in the shipment. If the customer discovers that the film was exposed, they know that they've fallen onto somebodies radar.
