Solving the "being human" part of security will probably never happen, which is why you're encouraged to do stuff like use 2FA, different passwords, service isolation and stuff like that.
Anyone and everyone can be fooled at some point, best to try and limit the damage.
I don't have an opinion on the man personally, but I won't buy a Samsung TV as they are ad riddled, terrible to use and are pretty fragile.
Not that you aren't entitled to your opinion, but software running on a Tesla is, in many ways just as mallaible as code on a vacuum robot.
There are several challenges, but basically the protections stopping people from reading and writing firmware would need to be defeated.
I think there have been some software jailbreaks on earlier models already that have been patched, but software is complicated, it's hard be bug free.
What if you don't have kids?
This is absurd, they have no business doing this.