Good idea.I cable lock (using a real padlock, not a TSA one) my guns to the frame of my luggage when putting them in checked luggage so they cannot easily be taken out of my luggage. A friend had his luggage "misplaced" when flying. The luggage was found in a restroom (not surei if the secure on non-secure side) with the guns missing.
Looking at the guns that couple had stolen, I would say that are persons of considerable taste, culture, refinement and social sophistication.
jet blue marked the outside of my bag with orange tag for flight into Boston. I Had to go pick it up at baggage claim which was right next to the carousel for that flight. Most people got their bags before a lady went somewhere for mine.