My main firewalling issue is my new car, with a SIM card built-in somewhere, formally "just to being able to switch on AC/heating from remote, locate the car et

My main firewalling issue is my new car, with a SIM card built-in somewhere, formally "just to being able to switch on AC/heating from remote, locate the car etc" but built-in with unknown level of real access from someone else computers. Next threats are not only from that: "smart grid" for charging (and discharging) cars will be another and so on. The real issue is that without MANDATORY free software and open hw we have no real choice but trust someone else not only trusting for it's honesty but also for the quality of it's work in safety terms. If a thief came in my home knowing I'm not there and steal something I have a good enough insurance, such kind of "safety issue" is already fixed. If someone attempt to penetrate my homeserver FOR THE PART I know of (i.e. the FLOSS OS/stuff it run) I can protect myself, I have offline backups etc. I have NO POSSIBLE PROTECTION for: - State services, often handled by private subcontractors, for instance for taxes. Sure SO FAR I still have paper backups of anything, but in a future they will not be there; - Smart devices capable of physically attacking something, like a self-driving car hitting a school groups on a trip stating I was in control, not in auto-pilot mode and that my control was fully effective to break/steer anyway, or a generic attack locking some cars in strategic places on the road networks paralyzing traffic for hours and so on. Most people do not understand even the possibility and implications of such threats, BUT THOSE WHO UNDERSTAND and accept passively or even worse implement such systems should feel themselves guilty for crimes against humanity up front...