Funny stuff, Thom.
I am in the UAS business, we design, tool, make parts and assemble UAS for commercial and DoD purposes.
I have been directly involved with UAS since 2002.
The revolution has occurred in propulsion, batteries, avionics and sensors...UAS that were only available to DoD in terms of vehicle and sensor performance are now available to all.
There is no going back.
There are programs being developed to counter UAS, but the sheer number of UAS designs (water borne, hybrids that swim under the surface of the water and then go flying, hyper fast foam jets, etc.) makes the problem difficult.
I was invited to speak at this conference but had to decline:
https://counteruas.iqpc.com/agenda/main-day-1