“For everyone panicking about the new Facebook feature that will let them listen in to your conversations via the app, let me clear up some misconceptions.
1. It’s only rolling out in the US.
2. It’s optional and you HAVE to opt-in for it. Don’t want it? Don’t opt-in for it.
3. It only listens in if you’ve opted in and when you are composing a status update. Otherwise, it is not actively engaged.
Find out more in the official Facebook announcement. A lot of blogs are using fear mongering data for page views.
(See, even the title stresses “optional”)”