My ninth-grade son and his friends have gamed like this. Their purpose was to figure out what to do in the event various types of attacks took place—where to hide, where/when/how to escape and by what route, which teachers to obey (there were two, both ex- or current military) and which to ignore or disobey. They obtained a floor plan of their complex school and thought about viewlines, communications, the capabilities of different weapons, which walls could be penetrated by bullets and which wouldn’t be, etc. It was useful.
Smart kids! I commend you, as a parent, for raising a smart and well-prepared son. :
Wow, that’s impressive. My ideas have consisted of figuring out what the best way to exit the room or building was, where the best hiding place was if just getting out wasn’t an option, and depending on those factors what would be the best way to obtain help and notify the relevant authorities of the situation via my phone/ipod/etc without drawing attention to myself.
BTW, playing laser tag or manhunt or other running-hiding-shooting type games inside the building in question, after hours of course, is a great way to figure out these scenarios. When Columbine happened, I realised that extensive hours of playing such things would be an asset if an attack like that was to happen in my church...