My favorite fun fact about the US military is that some old Navy FLTSATCOM satellites have been abused by Brazilians as free CB radio relays, e.g. by truckers to chat on the road.

These vintage 1980s satellites are nothing more than analog linear amplifiers without any authentication. It's open to everyone as long as long you can point an antenna at it, with a RF mixer at the right frequency. The military can't do anything. This audio recording is absolutely hilarious: https://www.solarix.net/wp-content/uploads/2012/09/260.625-US-Military-Channel-Warnings.mp3

https://www.wired.com/2009/04/fleetcom/
https://www.reddit.com/r/RTLSDR/comments/3guxco/brazilian_satcom_pirate_transmitting_sstv_images/
https://www.rtl-sdr.com/listening-brazilian-fleetsatcom-pirates-rtl-sdr/