I agree. It doesn't seem so outrageous to me that, after sending a CD worth of data, they drew a line. At a certain level of detail, what they report back is g

I agree. It doesn't seem so outrageous to me that, after sending a CD worth of data, they drew a line. At a certain level of detail, what they report back is going to start revealing internal secrets and IP, such as data models or algorithms. And given the volume of data that they did, provide, I find it plausible that they've drawn the line in an appropriate place. The headline is sensationalist scaremongering. A careful read shows that it's not the data itself that's IP, but that the form in which it's presented reveals Facebook's IP.