[my device's MAC address] is unique and belongs to me, how much more personal can you get? Regardless of its uniqueness, it can't be used by that data controll

[my device's MAC address] is unique and belongs to me, how much more personal can you get? Regardless of its uniqueness, it can't be used by that data controller to identify you because the collector does not have additional information. I can't identify you by reading your car licence plate, even though that information can be used to identify you by others who have access to a database of cars-to-owners. The point of the law is that I can't use it to identify you, therefore I don't have to notify you when I collect that information.