That's from Facebook's response to the scandal, right? Has that prompt always been there? A lot of people seem to be unaware that Facebook has been doing this,

That's from Facebook's response to the scandal, right? Has that prompt always been there? A lot of people seem to be unaware that Facebook has been doing this, and I haven't seen anyone say they saw that prompt in 2015. I searched Google for the text of that prompt, or any reference to Facebook accessing your SMS history, in 2014 to 2017, and didn't find anything.