Sounds like a possible stock opportunity in the near future TBH. Not that I don't hate facebook.

Very curious on the DNS wiping.

DNS is the real weakness of the entire internet. If a widespread BIND vulnerability ever was identified, the entire internet would pretty much blink out for awhile insofar as name-based browsing is concerned. Or many other possibilities. It's nowhere near as redundant as people would like to believe.

That would have to be a hell of a hack though to get to the keycards. If true, that is suspicious. I have a hard time believing a company like Facebook would leave their access/control server internet connected. That... almost sounds like an insider / deep network pen. Or a long undetected nation state pen to get that far...

Unless they are morons on logical/physical security, which is not entirely impossible, but seems unlikely.