We just cover it up with some clothes or towels and leave on the chairs. I've seen many cameras, and cam corders just left sitting in hammocks or chairs in plain site, but i always conceal it. We have taken the cam corder and took all the shots we wanted first thing in the morning and then took it back to the room before returning to the beach to enjoy the day. Of course most shots were just scenic on the cam corder and people on the camera. They do have photographers roaming the beaches and taking pictures all day too. You can stop them to take pics any time you want.
I havnt heard of anyone on our cruises having a camera stolen on CC.People leave them out around the pool areas on the ship too. maybe you could make an identifing mark on it so you could ID it just in case, if your worried.
mom x4,grandma x4