[amelius]

A law that's easier to justify would be an "anti-tether law": You should be able to use a device as advertised, even if you break all ties with the original vendor.

(Because otherwise, you bought a service and not a product; also: if I buy a device and want to use it to do business with someone else, why does the vendor of the device have anything to say about it? Don't I own my device?)