My personal method:
If I'm being camped, I lock my brake and go full throttle. My propellers start turning, and I'm not yet moving. Just as I start to tilt forward, I release the brake and spit out onto the runway many times faster than I would. As soon as I have clearance, I drop my bomb, and instead of turn fighting, I attempt to quickly spiral away from my base. If I time it right, they won't catch me until I'm a nice distance away. I Respawn immediately, with then farther away from my runway, and try them head-on, or turn them again. Their choice. I'll get them eventually though. Or, if I'm bored with it, I just quit.
If I'm flying away, and they shoot at me, I quickly turn, light them up, and spiral away. Repeat as many times as necessary. Or, if I'm on a good team, I'll twirl to the back of the map, a kind of indirect cover for teammates.
In a Btc game, I bomb, then spin around the carrier, not shooting, in order to get shot down next to the carrier and hopefully unload a tank shell into the carrier.
But I absolutely refuse to camp in a bombing mission. I hate the feeling of being camped, and I'd never stoop so low as to fall to their level. I've been known to reward myself with one free kill before my retreat though....
To each his own.