And the right 30-06 round will take down a drone. And a 50BMG round will certainly do it in the right hands.
The drones do not cause me to be afraid. And remember that in Texas there are a lot of excellent marksmen, lots of X-military, lots of active military who will not fire on Americans, lots of oilies, lots of rednecks, lots of old farmers. None of which will cooperate with that nonsense. They all have a grasp on reality.
A 30-06 will, indeed take down a drone if you see it before it sees you. A tiny quad-rotor with a camera and a 22mag single shot is a good assassination weapon.