In what way are these drones more of a risk than conventional remote control planes and helicopters? Is it just the ease of use and stability from the 4 or more rotors?
My experience with a r/c helicopter was that with a lot of patience (indoors, no wind) you may get somewhere near to your target. Outside with weather, moving quickly to intercept an aircraft would have been impossible (for me and my kit)
Oh and a personal moan calling it London Southend Airport just so the Orange ones can claim they fly to the capital.... It's not even in Southend