Would be nice to bomb a runway with any 100+lb ordinance and take it out. What it means is that the ability to take off in that direction on that runways is disabled for 15 or 30 or x minutes. It also means that you can still take off, but you'll have to use the hangar and you can still take off from and still use the runway - you now need to taxi to it.
So what I'm saying, all that happens is that the take-off direction buttons are red/grey'ed out for the duration. You can still land your kills on a runway, you can still take off from the runway, and the crater holes won't blow up your aircraft...but we're simulating a runway strike to slow down an enemy force.
Simple approach. Simple and effective military tactics!