[purple-dragon]

That's a design consequence, not a design consideration. Local TV stations can't control the way you consume their signals either, but it's not as easy to for you to filter out the content and disregard the pulp, i.e., inline advertisements.

[Nursie]

That's entirely true. But then the tv signal doesn't ask the tv to tell a few dozen other entities its deepest secrets.

That I know of. With smart TVs I guess it could well.