Always the chance another passenger nabbed them when passing ! I had a bad knee once so waited for plane to clear and saw a camera in opposite CW seat .... one of last economy passengers picked it up and I assumed would hand over to CC at door. As I got on bus I saw he still had it. I questioned him and he said he was going to hand in but why would you not give it to CC ? I said I knew who was sitting in that seat and releaved him of it and handed it at reclaim ... some dodgy buggers out there