"Return-to-home" functionality is quite common. The GPS knows where it took off, and where it is now, and in the event that it loses the control signal it'll (try to) navigate back home.

Having a drone under control is almost always preferable to having a drone out of control, particularly in the pattern of a major airport. If you're going to take it down, it needs to happen in a way that gives you control of the drone, not just messes up their control.