Sounds pretty much normal these days. To hell with the potential problems, because if it saves "them upstairs" some trouble, then it's ok... until a complaint does come in! If it seems they will be sticking with this idea, then you should push them for cameras to be installed in each car. I can envisage possible implications to this idea too, but that may just be my cynicism kicking in. Even so, it's not acceptable in any way for them to put you at risk like that.