Jazzyvee:
This case actually can't lock. The butterflys have the cutout for the hasp, loop, or whatever it's called - the part the lock would actually attach to - to poke through, but there is no hasp to poke through it. Even if there were, I wouldn't lock it as TSA would surely bust it open. If I were to consider locking it, I would get one of those TSA approved locks that the airport security can open with a master key or code or something. Sounds alot like what you describe. I figure painting my band's name on it, and putting all those stickers on makes the case stand out a bit. If someone grabbed it, it would stick out like a sore thumb as they walked through the airport. As for airport security opening the case and stealing the instrument? You pays your money and you takes your chances.
Bill, tgo