All kidding aside, I used to be annoyed with the seatbelt chimes in my Subaru. Someone told me the most ridiculous sounding sequence to go through that would silence the seatbelt chimes. Literally sounded completely made up, something like: Click and unclick the seatbelt 10 times while pressing the brake after turning the ignition on and off 3 times with the left blinker on while humming "Oklahoma".
It actually worked, and I didn't have a seatbelt chime again until I replaced my battery. I'm sure several of the steps weren't part of what was needed to be done to disable the chime, but I just re-created it as I was told.