After my luggage was dug into by some "now fired" personnel in Miami, a friend told me to put a piece of duct tape over the luggage.....so you can tell when someone goes thru your luggage. My understanding then was that they can NOT go thru your luggage without you being in the room...watching them (so they don't plant anything). I believe that rule is still in effect.
You could tie a big bright piece of fabric on the handle --- so you KNOW that's your luggage when it comes off the turntable.
Do NOT put your name and address on the label thing on the luggage. Too easy for someone to see it and know you're going to be gone for a long time. Just put your name and phone #.....inside you can put your address -- but even then, I wouldn't put it in there.