Because overwhelmingly bags are full of clothes and cosmetics. The majority of which will be already used in some capacity. Even the most opportunist thief pro

Because overwhelmingly bags are full of clothes and cosmetics. The majority of which will be already used in some capacity. Even the most opportunist thief probably doesn't want someone elses old clothes and half empty tins of hair product. Even worse if it's a return flight - that means the clothes are dirty!