"The first off-putting thing about Waziristan was a constant, inescapable buzzing," Muhammad recalls. "It was an annoying noise emitted by the drones scouting the area for terrorists to kill. It's a constant, low buzz, almost a hum, so subtle yet so present that it has become Waziristan's status quo, its not so silent silence. You eventually get used to it, but I sure was glad I spent my first two days in Miranshah's [the administrative headquarters of North Waziristan] only sound-proof hotel."
Eventually, you get used to the noise -- but that has its own issues. Muhammad explains: "When the natives would come home from a trip to the mainland, they'd talk about how the actual silence they experienced there was deafening. They experience pain when they hear true silence for the first time ... The humming carries along with them everywhere they go. In Waziristan, they never experience the purity of their surroundings, because they are constantly taking in the humming of drones."
They are basically addicted to the sound murder robots make. How's that for a Doctor Who plotline?