The Enemy is YOU!
If you are stupid enough to fall for the trap of putting 20,000 parts of a car online (by purchasing it in the first place), then you get what you deserve.
You get what you paid for.
There are almost no good reasons for building connectivity into formerly dumb devices. Any of those reason will only favor the manufacturer and penalize the owner.
There are really good reasons for taking away connectivity from many existing devices.
No one needs a smart tv, smart blu-ray player, smart fridge, smart stereo, smart car, blah, blah etc.
What I do need is an eight port home wireless router that would have enough capability for the stuff I have now. Four ports is just shy of what I would like to have connected.
That would be the only thing I need to have directly facing the internet.
Biting the hand that feeds IT
