This is a shark attack event. Good headlines but insignificant risk. Unless the thief was really after well used undies or cheap souvenirs I can't see checked baggage being a fertile paddock for crime.
There are enough people out there whom will go along to baggage auctions and pay real money to purchase bags which have been lost on the off chance that the bag contains something valuable. It stands to reason that there would be thieves out there whom might give it a go.
Of course, physically getting access to the bags is one thing, actually getting away with the crime is another. Apart from the risk of picking out a bag which belongs to someone else whom is standing there, you are almost certainly going to get your face on CCTV. Whilst airport security isn't going to notice someone "accidentally" picking up the wrong bag, they may notice someone hanging around the baggage carousels all day.
The other part of the equation is that most airports are not cheap to get out to. So you're going to want to get something truly worth while to cover the costs of getting there / back.
So from a thieves point of view, it's expensive to get to, there is a high likelihood of getting caught, unless you strike it lucky the yields are going to be low. From the point of view of the thief just getting "empty" addresses to rob, even simply trying to get addresses from bags doesn't pose a huge risk, since the thief would need to find a way of getting a list of potential addresses together, and there is no guarantee that the house would be worth breaking into.
If I was to put money on what thieves use to determine what house to break into, I'd say things like mail building up, bins out at the kerb at strange times, and cars in / not in the driveway which is different to normal. Most break-ins are simply ones of opportunity, not carefully planned events.