> Imagine that Big Brother scenario extended to the millions of smart devices such as digital thermostats and fire alarms feeding the Internet of Things ecosystem, and you have a problem that could eviscerate the privacy of billions of people, say security experts. Is this anything but opportunistic scare-mongering? "Spy agency own spy tools. Wouldn't it be scary if they used them on you?!?!?"
"Wouldn't it be scary if..." is different than being provably known to do/use/abuse.
As far as I'm aware, the only documented case of inappropriate tool use is overly broad selection criteria on legitimate pipelines of information (and related abuse of access to that data) -- the Snowden leaks. That was a doozy with serious constitutional implications.
But that's substantially different than "they're hackin muh TV!" just because the CIA developed the ability to as part of their mission to spy, which I dont believe we've seen evidence of indiscriminate use.