Are restroom urinal mirrors a good idea? You bet!
About a week ago, I saw something in an airport restroom that I've never seen before, eye level mirrors just above the urinals. I didn't know what to think of them at first. They seemed a bit out of place.
Eventually I realized that when men are using the urinals they can't keep an eye on their luggage and my next thought was... why not put them in EVERY public restroom? It's not just about keeping track of your luggage. They can be just as handy if you've got shopping bags, or simply so you can see if anyone is trying to take your wallet.
The bottom line. I love the idea.