Theft is not a breach of security
I couldn't agree more! If they can take something out, logic dictates they may put something in. But the larger question is why are they "forgetting" to put back what has been removed. All of us have see the tables they inspect bags on and all of them have a back to prevent things from falling behind. Since they inspect one bag at a time, one would think that items left out would be noticed immediately after pulling the bag off the table. I've mentioned before how much we, as photographers, routinely lose and the ineffectiveness of the clain system. The system has more holes than Swiss cheese!