Errr, I can see some overlap, actually...
The problem, especially at EWR and JFK (and probably PHL), is becoming so large that something is going to have to be done. No, you won't catch the girl with a "new" set of earrings, but you'll hopefully stop some of the high-end thefts. Lesson to us is to keep valuables out of checked baggage - or buy a lot of insurance.