Security theater.
You didn’t say this Skywise, but “security theater” suggests that the public is being frauded with respect to appearance of security.
Since California mandates gun free zones, corrections welcome, California needs to do the following.
California needs to require fence manufacturers to post fence compromise ratings near entrance to fenced areas. “It takes min. 5 minutes to open a four square foot hole through this fence,” for example.
Gilroy probably didn’t have drones flying outside fence, the fence probably under trees in some spots. But drones would at least give whoever was watching fence a roller-coster thrill, public safety a priority, instead of security people daydreaming while watching boring camera monitors.
I know! Maybe security people could participate in drone time races for circling fenced area. Extra points for maneuvers. Again, public safety a priority.
Sorry for the somewhat whimsical suggestions, but I hope that somebody gets inspired enough to develop technology to help prevent loss of life.