Technically your right but...
"Last month, the federal government proposed that all new passenger vehicles be equipped with the devices. But 96% of new cars already have them, as do at least 150 million older vehicles. American makers, led by GM and Ford, have been putting them in cars since the mid-1990s."
'Black Boxes' are in 96% of new cars
Not all of the existing black boxes do everything that y'all are afraid of, like cut the engine or track your GPS position. But again, if the Congress wants to add those features, they can unless we can defeat it on 4th Amendment rights, and those features don't require automating driving.
So it doesn't make sense to oppose automated driving on the grounds that government can put those features in, when government can put those features in anyway without the automated driving.
I know what they do. My brother use to design them. And I know they are nothing like a ‘black box’ because I do avionics for a living. I have designed everything from autopilots to networked tracking systems for things like flight tests. I know what these things do now (not much) and what they could do (stuff that scares the crap out of me).