Until proven otherwise, I am going to operate on the assumption that the mysterious spy balloon floating over the US is "Rover" from The Prisoner, on a mission to return a wayward agent to an isolated, whimsically anachronistic retirement island in which residents are referred to by number.
Mcgoohan was a genius. I loved his work.
One could say he was prescient, but I think he found a unique way to express something that has always been with us. He's saying, ALWAYS be vigilant. Of others. Of yourself.