Scott: did you check whether Sir Alan had half inched your gear? But seriously, was your plane locked up? I'm amazed to see people leave planes unlocked and unattended - forget about the camera, but a couple of decent headsets (Lightspeed Zulus, Bose etc) would also put a serious dent in your wallet replacing.
I know, in the old days we could leave our houses unlocked but that was when nobody had anything worth stealing......