i did this! i cut the heads off the cards wrote our name and address on the with a sharpie and then laminated them. then i punched a hole in the top and put them on our suitcase with the zip ties. it worked out great. we have red luggage (along with everyone else in the world-or on our flight at least) and our luggage stood right out with a lime green mickey head. it made for getting our stuff so quickly!
i would highly suggest doing it!!!!