A couple of years ago I worked at a place that introduced a card reader at the door. You walk in, you swipe. You walk out, you swipe. Everyone gets a card, ever

A couple of years ago I worked at a place that introduced a card reader at the door. You walk in, you swipe. You walk out, you swipe. Everyone gets a card, everyone gets their times clocked and scrutinised. A couple of months of dutiful swiping later, one of the guys got curious and... found that it wasn't connected to anything. (A bunch of people left shortly after.)