For example, I think "policy that hasn't kept up with new technology" is far more likely than "semi-malicious coverup." And "legitimate need to control access to the area" as well as "fear of a mid-air collision with small aircraft" is at least worth considering.
Following the rules is what malice looks like. It's not like the evil people of the world sit around twirling their Snidely Whiplash moustaches and congratulating themselves over how much harm they've done today.
For example, I think "policy that hasn't kept up with new technology" is far more likely than "semi-malicious coverup." And "legitimate need to control access to the area" as well as "fear of a mid-air collision with small aircraft" is at least worth considering.