I don't know, is this really an important scenario? If I wanted to harm a specific individual, I would manipulate the individuals car (like I would today). And

I don't know, is this really an important scenario? If I wanted to harm a specific individual, I would manipulate the individuals car (like I would today). And who wants to drive an undirected attack on everyone close? That would be considered a quite serious crime that takes a substantial technical effort, with little to gain.