Just a visual barrier would do wonders I would think in terms of an attack from a distance.
It would force the attacker to break in the containment area and under those conditions it could be alarmed so law enforcement is triggered on entering. The thing is, most of these type facilities are not in populated areas and are unmanned. So breaking in and doing serious damage wouldn’t take long. But that is considerably better than being able to cause the damage from a distance without entry.
Something needs to be done... Thanks for the information and your time.