Of course, I forgot "security".
The aircraft cleared to transit never look out the window and the pax never take pictures.
The pax on the commercial aircraft that land there never look out the windows or take pictures.
The punters at the civvy terminal can't see what's going on on the other side of the runway.
It's the warm inner glow of 'security' caused by the compliance of law abiding citizens.
I tried to make the point earlier: Lines on charts and airways clearances are not going to stop the real bad guys.
Jnr: Calculate the percentage of time all that's going on, compared with the 168 hours in a week.