I'd love to know how to identify the location of a drone operator if someone's put a drone out on an autonomous mission plan, and all it's transmitting is the video feed.
You can't "triangulate" on the *receiver.*
And they already knew where the drones were.
So, barring GPS jamming (which is a really bad idea) what else are they going to do?
Any weapons or countermeasures could result in "unforeseen impact" downrange. Blind the drones with lasers? Sure. But you've got I-10 to the north, Phoenix and Sky Harbor to the east, the military range to the south, and Ghu only know how many aircraft are downrange of your laser. Shoot them down with something? Possibly. But what's downrange if you miss?
If it happened again today, I'd expect they'd follow the drones and see where they went - assuming they weren't under active control. Now that they've installed passive countermeasures, they should at least know where the control station(s) is/are if they're under active control.