Anyone can fire a heatseeker, just like anyone can use Auto Locking. To be successfull in this type of mission, one must pilot well and his gunner must fire well. This would surely increase competition amongst clans online, bringing the war from the ground to the air.
[Note: Im not in a clan mind you]
You can conduct a Dogfight in this game with reasonable thrills... the nice thing about this game is the complex terrain, while most Air sims dont have very good terrain at all...
So a pilot can hide behind mountains and pop up behind an enemy to blast him away, while others favour the traditional "circle/spiral fight"
I know you can dogfight in this game, as those MFCTI maps always get the occasional half decent dogfight, providing both the teams are good.