The only people who don't notify software developers of exploits they find in their systems are criminals. That the FBI are happy to act like black hat hackers in this is pretty amazing.
I mean, for heaven's sake, "in Syria, militias armed by the Pentagon fight those armed by the CIA"[1]. And that's just the latest incarnation of this tired old worn out story.
Governments are nothing but the criminals we've decided we'd be better paying off than let run loose, whatever good it's done us. That's why governments are, ostensibly, so against 'organised crime', just a turf war really.
The only question left, then, is: What major bit of dumbshittery will government agency XZY slap itself in the face with next and get away with it.
1. http://www.latimes.com/world/middleeast/la-fg-cia-pentagon-i...