I am not sure what you are driving at Stardog. Do you not want to let people come up at a base because it is under attack? Or not be able to move around? What if the field you flew out of was captured, and the only other fields your country has is under attack? Are you out of the game?
At what point should that base be frozen from new planes coming up? With one plane circling over it? Two? When it has sustained any damage from a bomb?
Would this fit in your thinking, I get a few guys in B17s, go up high, drop one bomb on each field of another country and nobody can fly? Maybe you see where I am heading.
Actually what you want is possible, and often accomplished, but it requires destroying the hangars, both aircraft and vehicle hangars.
Then, nobody can come up.
Since you are new, you may not have been aware that this was the way it worked. This being the requirement to "close" a base, it encourages countrymen to work together, develop and follow a strategy.
Welcome to AH, I hope you enjoy it.
Dago