As much as Mr. Waldron is clueless about the game, I have always thought there should be planes parked around the fields, just as there were in RL. It would be nice eye candy. They should not, however, be counted as kills, simply additional objects to be destroyed.
As a means of giving them some value, they could be tied into the ENY system for the airfield they are destroyed at, limiting the lower ENY planes at that field as more and more are destroyed, with some sort of cap so it doesn't go out of control.