The FAA is guilty of cost focused magical thinking. They had some idea that anti-jam techniques would migrate to civilian platforms, but that is delusional, especially as the number of GPS enabled in flight devices has exploded. Maybe for special certified devices for ADS-B. But it is extremely sensitive tech, and anything smarter than a noise jammer can be difficult to deal with.

I think they plan on having jamming surveillance nodes set up near airports. But of course, detecting isn't fixing. How long did that (imaginary?) drone take out Heathrow airport for?