I thought you might be interested in looking at How to lock a backpack so that you can't pick it up and wear it. Harder than it looks.
https://forums.bohemia.net/forums/topic/167479-how-to-lock-a-backpack-so-that-you-cant-pick-it-up-and-wear-it-harder-than-it-looks/?do=findComment&comment=2617713
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