Bluetooth Needs A "Connect Automatically" opt-out, like wireless networks

I mostly work from home, and spend a lot of time on conference calls. Not infrequently, my wife will drive somewhere after I have started the workday. So guess what happens? Her car steals my Bluetooth connection, to both our dismay.

This is such a basic problem, I can't believe it hasn't been widely-solved at this point. Off the top of my head solution: Bluetooth devices should have a "Connect Automatically" checkbox, the same way that WiFi networks do.

That is the table-stakes solution. The enhancement would be to offer a third choice: Connect Automatically if phone is not currently connected to a different Bluetooth device.

Summary: 

1. Connect Automatically (the way it works now)
2. Connect Automatically if phone is not currently connected.
3. Do Not Connect Automatically.