It's certainly not "easy " to do. Even if the preponderance of kills are bombers, those bombers shoot back, no matter which angle you shoot them from. You have to kill them AND not get damaged or your run is over. The 262 engines are pretty easy to take out too. Killing fighters is a matter of getting a good angle and unleashing those 30's but if you aren't in front of them they cannot shoot you. You've also got to land at a base a bit away so those who saw you can't vulch you while you re-arm. It's definitely NOT easy or you would see everyone do it.
WTG Jazzi <S>