it’s a very nice idea, especially for voice audio.
Perhaps a little pilot program where they just tested if they could even get a cat to behave in a way conducive to eavesdropping might have saved them a ton of cash. Or just ask literally any cat owner if they thought it would work (they would almost certainly and universally declare it a hilariously bad idea)
At this point I doubt it is hypothetical anymore but more a question of how long it is there are using small drones in their current spying operations.