Fly over a target rich field that has been de-acked, bail at the end of the runway. Walk over to the spot where the planes are spawning in, wait for LA-7's (or any other plane that you hate, I choose LA-7's) to spawn in. Shoot directly into the cockpit. If you hit their pilot you will see blood on the cockpit. Pilot wound!!! Most annoying thing in the game....
There are a few variations depending on how much of a jerk you are:
1. Only shoot perk planes.
2. Shoot every plane. Remember though, you only have 15 bullets, use them to their maximum irritation benefit.
3. Shoot 3 times in rapid succesion to actually blow the plane up. I'd rather give them pilot wounds though.
I usually only do this when I am in a particularly foul mood that has been brought on by HOin LaLa's. That's why I do it to LA's. Another reason I do it to LA's is because they don't catch on. They just keep reupping at the same spot. All they have to do is up at the opposite end of the runway and fly over and shoot me, but alas, they don't. Commentary on the intellegence of your average LA pilot? Hmmmm.
This sure does irritate ppl. LOL
One last tip: Bish are slower to catch on than Knits. LOL.