Wish we had them here in our Walmarts. We have 2 supercenters in our town. Things have got so bad that either my wife or I always stay with the pick-up whenever we shop. That being said I can see the potential for abuse.
Funny you say that, I had a conversation with an off duty police officer one time (Phoenix suburbs) and he told me the areas around Walmarts were hubs of criminal activity.