That drone hacking link is pretty interesting.
However, if you’re just interested in disabling one, I would think another drone that could intercept and drop some sort of propeller-fouling material (pieces of string, for example) would be low tech and very effective.
Aren’t the drones controlled by radio signal?
Can’t that signal be jammed?
Jamming is an old technology. The soviets used jamming to intercept radio transmissions they didn’t agree with.
And they would be most vulnerable when taking off and landing. Low and slow meets mean ole Mr. Goose gun.