No, it is dangerous because it subverts even quite well-informed expectations of a product. If I purchase and install an appliance, and do not connect it to a

No, it is dangerous because it subverts even quite well-informed expectations of a product. If I purchase and install an appliance, and do not connect it to a network, I have a reasonable expectation that it will not not send my personal data to the manufacturer. It is unlikely that consumers will anticipate hidden data-gathering being performed by products. We already enforce standards to validate that products will not do things like burst into flames, or emit toxic gases. It is equally reasonable to require that products being sold to customers meet acceptable levels of protection for private data. Additionally, you are still welcome to make that trade-off for yourself. Regulation requires that you are informed and in some cases consent to data-gathering. It does not require it to not exist.