As a professional musician I frequently fly with a lot of gear. A guitar or two, effects, cables, etc. Virtually every time that I fly through LAX or OAK, the TSA screeners steal something out of my checked luggage. It might be a guitar tuner, a fuzz pedal, a cable, or a couple of sets of guitar strings... This happens every time; without fail. I've complained and I am sure it has no effect. I probably make 20 or 25 flights a year where something is stolen from by checked luggage by TSA. Probably $600 worth of stuff per year missing from my luggage. It seems to be standard operation al procedure in those airports. My other musician pals report the same experience to me.