It's not difficult to with the right equipment, but you would need some power to cover such a large area, I built an FM transmitter some time ago
and used to wind up the guy living next door to me, he used to listen to Radio 1 every lunchtime so I designed a transmitter that was just powerful
enough to cut his reception out, but no-one elses. I don't know if he ever bought that god was talking to him through the radio though.
As this is documented as happening and not a hoax, I gotta say it's frakkin' creepy. What they were trying to say with that is anybody's guess as I
have no clue. A very odd clip, thanks for bringing it up. I'll never look at Max the same way as I'll always think of this creepy stunt.