Ya had me up until you said “moving toward the gunfire” Seriously, I get what you are saying but jeez that sounds like it would have a horrendous price tag attached to that implementing it in schools all over the US. It is an outstanding concept / kudos for your idea!!
Not sure of the cost, but the protection of schools is going to be a hearty price tag for all of us if some solution is implemented. It will be said at what cost is to much for the safety of our children.