Probably the most effective technique for detection would be attained by spoofing the GPS signals, like the IRGC did to capture multiple US' drones?
https://www.gpsworld.com/gps-circle-spoofing-discovered-in-i...
I wonder how easily GPS can be spoofed, locally ...
https://rntfnd.org/2021/10/28/cheap-and-easy-gps-gnss-spoofi...
Seems someone already had the idea:
https://www.reddit.com/r/hardwarehacking/comments/10na5c8/sp...