I have a simple trick to prevent anyone from doing a quick snatch of things from my checked luggage. I put a small steel cable thru the lanyard hole of the various items and lock it to the inside of my luggage. They can see and inspect each item, but can not remove anything without cutting the cloth tab to which the cable is attached. Cut the tab and the cable comes apart. Obviously easy to remove, but it stops the "quick palm" trick.
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...........From Nomad.........Been "on the road" since '97