Hi Dlonk,
thank you for sharing this. I could not affirm this. Here my Phone disable the wireless connection and posh disabled and mark my wireless Network with a grey shadow.
However, if you need a shut down you should verify it by dmesg.
Just for the Nerds of us… you could also use a Software Firewall instruction to dismiss Network packages. The Hardware Kill Switch is only for us folks who do not trust the Kernel and Hardware and Network Driver in the first place.
To have no Phone available and do not record Data is the best way to avoid something. Its just the sad that in this information warfare world where we are, that everyone have to think about this.
Regards
Christal