Though this is a fun concept, I'm sure it'd have a stronger legal standing if it sent revised contracts to sites through a reliable and expected route such as email rather than an unknown and nonstandard HTTP argument. You might as well submit a revised physical contract by wadding it up into a ball and throwing it onto the lawn of the agent that gave it to you, continuing merrily as if they accepted it. Whether a script would be able to find reliable routes is another issue.

Am I wrong in presuming the satellite on display is either a spare or a recreation? Unless the NRO has some reason to safely capture and return satellites instead of allowing them to burn up in the atmosphere. (Were it a spare it's interesting to ponder how many backup clandestine satellites may be lying around.)