To the Pirate Bay: a modest proposal
In the biomimicry department, I'd look to the birds. Imagine an ornithopter mimic that seeks out power lines, clamps onto them, and powers itself via inductive pickups in its feet. Its battery gives it a 10-minute flying range; this gets recharged first. Then it goes into broadcast mode.Sure, its signals could be triangulated, but if the mimicry is clever enough then it might be difficult to distinguish from a real bird. And it could be equipped with various means of monitoring its environment (such as an RF receiver which monitors the strength of nearby police-frequency broadcasts), which would allow it to rapidly bug out at the first sign of trouble. It takes to the air, circles for a few minutes, then finds another power line and starts over again.