The point I was trying to make was that from a market efficiency perspective, this kind of thing should not be a problem.
So it might be more expensive to remove the feature altogether, including the advertising revenue it would generate. Such is the cost of privacy, apparently.
But once the HDMI input is up and delivering, whatever content you pick comes through it from the smart box(en) upstream that are the only thing(s) connected to the Internet.
Of course, I suppose that may not work with people who have cable TV -- those cable TV boxes probably don't or will be made to not cooperate, as much as possible. Don't know -- don't have one, right now.
Maybe TV's will become like Windows computers, at least for some of us. Buy the "smart" version because it's the only one available or has a price break, and then "throw out" / don't use the OS that comes with it (well, except to display whatever the upstream box is putting out).