Dunno about the US, but here in the UK, if someone were to die in a car equipped with a button labeled "insane", for our tabloid press, that button would be the main focus and the car manufacturer would be hauled over the coals based on that alone. It would be sold to readers that having such a button encouraged insanity on the roads, and the manufacturer would be claimed to be irresponsible for having such a button. Oh, that would be true, even if the manufacturer could prove that the button was never used.