Why are they so elusive? Because the aliens are monitoring us. Why? Because they are discomfited by our aspiration to “weaponize space.” Have we shot at them? Yes. Should we shoot at them? No. Really? Yes. Why not? They’re friendly. How do we know? “Obviously, any civilization capable of routine interstellar travel could terminate our civilization in a nanosecond, if that was their intent... See more at newyorker.com