I guess the moral is to never put anything outside your room that you'd miss if it was stolen. That said, I had printed off extras of a few things in case they went missing and nothing did... just ended up with one from someone else.
It is disappointing, but not surprising. It's a public place with an illusion of happy and safe. What's really sad is when people are in an FE, something goes missing, maybe repeatedly and the family thinks their FE group cheaped out on them. How do you politely ask, 'hey guys, did you all remember to do your deliveries, because we only got half of what we expected'.