A woman standing next to me at the OGG baggage carousel was carrying two blankets that she had just stolen off our OAK - OGG flight on AQ. I told her that the blankets are re-used and she said: "Well, the f/a didn't say anything and I walked right past her."
Maybe blanket stealing should be another item on the list of "How You Can Tell if Someone is a Newbie Flier."