Drone vs. bow and arrow?

Besides government regulations, bad weather, weight restrictions, and all the other issues that plague Amazon's budding drone delivery service, the company must also face the prospect of thieves shooting down drones to steal their packages. It's a problem that Amazon has been working on since at least 2014, when it filed a patent for "countermeasures" to protect drones against everything from gunshots to hackers breaching its navigation software. The patent was approved last week, GeekWire reported, offering insight into how Amazon intends to safeguard drone-borne packages of the future. The patent describes two main lines of defense for the drones. The first are electronic systems designed to detect signal jammers or other hacking attempts, including a backup communications interface if the primary one is compromised.