We locked all of our bags on a trip that past November and we were chosed for a random check so I had to figure out which keys belonged to which lock on all 6 of our suitcases while trying to keep my kids out of trouble. It was crazy. I've vowed to color code the locks and keys this time with different shades of nail polish but I am still going to lock them. I thought I read on a previous post some time ago that if they want to search your luggage and it's locked, they'll page you. Did anyone else see this? Of course, in an emergency, they can do anything they need to do to access the luggage, but I'm still locking them.