I haven't had anything stolen from the parks, but I think the maid tried to steal something from my room at Pop Century.
Let me explain. I had taken of those really cute sheet of Disney stamps that the USPS has been putting out lately to WDW with me to send postcards with. I had left the stamps on the little table where I had been writing postcards. When we were about to check out, I couldn't find them, and I hadn't moved them, and neither had my bf. I looked everywhere and finally found them behind the bed between the bed and the wall. My theory is that the maid figured I wouldn't miss stamps like I would miss jewelry or money or something, and she thought she could just come grab them from their hiding place after we checked out. Luckily, it wasn't anything too important (camera, money, etc), but I'm almost 100% positive the maid hid them because I had left them on the table and like I said, my bf didn't touch them. I will be more careful with my stuff that I leave in the room when I go back to Disney.