I think we are all too dizzy from going round the same old circles so many times.
To pick up on 'wasted hours'.
How does one quantify wasted hours? You'll never know how much effect just the noise of the aircraft has on cutting crime.
Much like you can't quantify the crime cutting effect of a bobby on the beat. Is a bobby simply walking around a deterrent, or wasted hours? I'd like to point out that the publics biggest call is that they want more bobbies out on the beat!
Doesn't that tell you something