Just to reiterate....
.....our neighbours came in our room *by mistake of course* (undeterred by our snorkelling kit on the door step) and helped themselves to some of the contents of our mini bar :-0
If you're gonna steal don't leave a sandy/wet footprint trail.....grrrrr. And at least they had the decency to admit it when confronted.
We'd gone off for brekkie and that door was closed but, it seems, it hadn't been locked by the room boy. Luckily all our valuables were in the safe.
We had been in the habit of leaving the bathroom door unlocked to go in and out however.....but it makes you think.