There should be a labelling standard for this where the manufacturer must disclose if any registration is required to operate the device to its full potential, if any app or special software is needed other than a system driver, if any phone-home data is being sent, and what data is actually sent, when and why.
"Buyer beware" but most of the time you have no idea what the experience will be like. It's usually not disclosed on the box, reviews rarely mention it and I'd like to have a sure way of being informed before I make my purchase.
It's a similar thing with software, software and apps that require registration for no other reason than add you to their marketing list, but it's particularly egregious with physical items.