[ohyes]

The problem with either message is that it requires enough context to predict that the future state will make the computer unusable. (I know there are no HID usb devices, I know there is a Bluetooth keyboard and mouse).

Neither message is particularly bad, but hypothetical error messages are just that. Either message would require piercing the veil between the Bluetooth transceiver and the devices that rely on it, meaning you’d have to be careful to avoid a leaky abstraction. (Bunch of HID detection spaghetti next to your clean Bluetooth disabling code).

Agree about the switch.