I would like to see this too. The static planes simply collapse and look like burnt when shot at. It would be nicer to see them have normal, maybe a bit simpler, damage simulation.
It is possible to place AI aircraft on the ground but the issue with this is that the game will load flight models, damage models, ballistic models and everything else related to moving aircraft. Meaning that the more you use the more demand you place on your system. Where as static aircraft have a damage model only.
If this damage model could be modded to be more realistic that would be great.
for now check out 4hccrash's lengthy yet extremely informative post about placing static ac here. if you follow this advice but leave out the tank tha planes will stay put for the entire mission
You can use test runways if you want to place AI planes near but not on a runway, or you could search this site for the reduced airfield influence mod which will let you do it without the test runways. (this mod may effect missions that were built without the mod)