At first I thought this was similar to a bike lock so that your Mac can't get stolen. But that doesn't appear to be what this is. I don't see why simply "locking" your screen with something as simple as configuring a Hot Corner (all I do when I leave my Mac is swipe my trackpad to the bottom left) and it locks the screen. Logging in again isn't a problem no matter where it is. The fear is that if I'm in a coffee shop, my entire device will be stolen.