And I'm sure no one ever abuses that by watching a movie while driving...
As much as I generally don't love technology taking a paternalistic attitude toward restricting what happens on the infotainment system, I really don't think it's a good idea to offer a feature like that, unless it only functions when the car is stopped and not in gear.
Tv reception has been a near standard feature in Japanese car info infotainment systems for decades. The digital tv standard includes "wanseg" for mobile tv reception, using a low bandwidth/ low resolution side channel.
Very common to walk past cars stopped at the lights and see tv showing everywhere. they dont turn it off when they start driving either ;-)