Re: Surely though
I believe it was Bruce Schneier who warned (sure he's not the only one) that a system with too many false alarms lowers security.
Let's pretend you're a guerrilla wanting to attack a fortified camp, which is ringed with smart fence kit. Now, have a herder drive goats near it for a month, setting off the alarm every night. Soon enough, the guards are going to turn off the fence, or ignore its warnings.
The camp is now less safe than if it relied on Mk 1 Eyeballs. Esp if the army decides it can do with less men cuz 50M$ fences. And even more so if the generals insist those fences work against real world evidence.