Indeed. What bugs me the most is that we're all involuntary and unknowing participants in their testing, perhaps for decades.
When a new version of Windows comes out, I can sit back and laugh at the problems of forced upgrades, new spyware, compatibility problems, etc., because I don't have to upgrade right away. I can wait until the worst of the bugs are worked out.
But now we're in a position where this lady was a few minutes before her death. Is some driverless car driving toward me now? Will it have the "brains" to not run me over? If these ever go national, we're all part of the testing process every time we're on the street for a decade, maybe two.
Not exactly a direct reply, but energy storage devices becoming available allow production of a relatively powerful garage-build EMP in the context of short to moderate range disruption of electronics.
Teledyn e2V markets such a device to disable engines without disabling brakes or steering. They claim a maximum 800 meter range. Someone will eventually build a less discriminant knock-off that can take out automated control systems.