A point is, that after being successful, it is human nature for the bank to want to discontinue. Real guards were successful, but, hey we haven't had a robbery, so let's get rid of them.
Hey, we haven't had a lot of need for the police, so let's cut back the PD.
It will be because of false positives, and repairs over time, that they will cut back. Human nature.
Over and over and over and over.
Then, robberies will happen again, and everyone will run around trying to fix the "new" problem.
Gotcha I could see that happening but I would fight it to the bitter end.