The FBI can turn on your smartphone's mic and listen to you

Ok, all you PC and Android users out there: be warned. The Wall Street Journal just broke the story of FBI agents using malware on smartphones and PCs to listen to individuals suspected of wrong doing.
Basically, the FBI is hacking people's devices so that they can turn the mic on and listen in on conversations. This is traditionally the sort of stuff reserved for conspiracy theorist websites, folks. And to be fair, the FBI does need to obtain a warrant and there doesn't seem to yet be any evidence of their using these seriously shady tactics against anyone who could remotely be a decent person.
As far as the records show, only members of organized crime, terrorist cells, and child pornographers have thus far been subject to this sort of surveillance. The FBI is also supposedly only using these techniques when "they have no other choice." We're not exactly sure what that means, but it doesn't sound entirely on the up and up.
As for you iOS folks, we're not entirely sure that this particular hack relates to you, as Apple has to be complicit in anything you download onto their devices. That being said, nobody ever said Apple was above complying with government orders. They're listening. You have been warned.