Antenna tech has moved way beyond what was possible in the days GPS was invented. Planar arrays and MIMO are ubiquitous and cheap.

These antennas have a very good idea of where the signal is coming from, due to delay measurements and can detect and filter ambient noise. They are super hard to jam. The reason why drones have become such a PITA is that these inexpensive antennas are very hard to defeat even with military jammers.

If this becomes a geniune need in the civilian sector, then I'm sure the tech is up to the challenge.