I got a snicker out of reading this today.  (VBG)   Here is the direct link if you would rather go there-
http://english.chosun.com/w21data/html/news/200608/200608180032.html
Korean Air officials were surprised when they found that a thick pink envelope  delivered to the carrier’s center at Incheon International Airport contained a  checkered blanket of the kind provided to passengers on long-haul flights  together with a letter. The sender was a man identified as Min from Cheongju,  who recently traveled aboard Korean Air from Incheon to the Philippines and  back.  
On getting off the plane, Min wrote, he saw many passengers stuffing the  blankets into their bags or simply carrying them off the plane and, assuming  they were free, did the same. But once home, Min opened the wrapping and found a  notice saying the blanket was the property of Korean Air. Feeling guilty, he  decided to return it and apologize.  
"The other people who were taking the blankets with them said it was included  in the price of the ticket, so I took mine as well. I am very sorry," Min wrote.  "Next time I have an opportunity, I will again fly Korean Air. Fly safely."  Indeed, a message attached to the blanket reads, "PLEASE LEAVE ON THE SEAT AFTER  USE KOREAN AIR."  
However, each year more of the blankets go missing as many passengers either  do not know or do not care. In 2001, 176,000 were lost, soaring to 300,000 in  2005, costing hundreds of millions of won. The blankets are light, warm, easy to  carry and made from pure wool --making them a prime target for travelers who  intend to go backpacking.  
From time to time, there are passengers like Min who repent and return the  blankets, but airline staff cannot check every passenger as they leave the  plane. An airline staffer says, "When I was working in America, we had one  Korean-American passenger whose child had left with the blanket on a trip back  from Korea, but the woman returned it saying that was a way to educate her  child.” He added, "It’s easy to say that it’s just one blanket, but we are  grateful for the letter."