Sure. Better doors and locks would be very helpful.
Security could be improved in lots of ways.
In Baily, Colorado, the architects learned from Columbine on how to better design the whole building. This apparently helped contain the perp and allowed the good guys to get closer without being seen by the perp.
The next issue would be the cost.
#166. Yes, as soon as thought of it, the cost question popped in my head as well. Another vexing question.
Best FReegards,
Defender2