Great job! Thank you for the work you do!
Sometines I think that it could be easier to maintain the list
of _trusted_ URLs than the list of BB-related ones.
I'd even agree to limit access to my local wireless network, denying
all attempts to get outside.
In order to try this, I arranged an extra WiFi router with its WAN side turned Off.
I quickly learned that the last kindle firmware catches these situations,
and doesn't even connect to such wireless networks, keeping the airplane mode always On.
I suspect the kindle version of wpa_supplicant, but, unfortunately, no chance to get deeper on that..
Is this a known problem? Any workaround for that? Am I missing something?