The RF kill switch on laptops is implemented outside of the wireless
chipset and mini-PCI card. mini-PCI defines an IO inhibit signal (one
electrical line) which should cause the card to stop all external IO
(modem, network, VGA, RF, etc.). There are drivers for some of these
(see rfswitch.sourceforge.net). It may be possible that we could report
that current state of that signal, and that would probably be useful.