One of the agencies here had a vest purchased via public fundraiser by kids who were worried about the dogs safety. The K-9's here often show up in schools for programs.
It seems kinda silly to spend $15k+ on a dog and not protect it but thats just me.
Back to topic: The high school here I went to most all of the rooms are concrete block and steel with no windows. It felt much like being in a prison and when I went there last year for a graduation it looks even more so now with the metal detectors, cameras and guards.