If I wanted to stalk my employees, I'd make them register their license plates and hire a service to ticket/tow unregistered vehicles. Then, I'd have access to

If I wanted to stalk my employees, I'd make them register their license plates and hire a service to ticket/tow unregistered vehicles. Then, I'd have access to the roster of names and license plates without the hassle of actually keeping an eye on the parking lot. Memorizing the roster wouldn't take much time per day, and you can spook people by looking them up before a meeting.