:-). This is mentioned fairly frequently. The correct thing to do is to just disable the device (using the slider at the top left) so you don't see it and leave it alone.
It occurs because until you provide the password, we know the device is made by Nest, but we can't tell whether the device is a camera or something else like a thermostat. It would also have worked if you signed in to Nest so we could tell, but since you'd get no value out of doing that, we recommend just disabling the device.