Comment There's a way to mitigate interference. (Score 2) 46
Satellites can broadcast to a tight geographic area thus minimizing any potential interference. Basically it's an aimed-cone around the antenna that restricts the signal from reaching any area other than an intended geographic circle on the ground.
Dish Network does this with local broadcast channels. If you subscribe in one geographic area, and move to another far away, you lose access to the old local network channels, not because of any digital restrictions based on zip code plus gps location, but because you're simply outside the area the signals reach.
The same technology could be implemented (perhaps already is) to mitigate any potential interference with ground-to-space signals.