There's a lot of people who are fearful that Facebook probably knows too much about its users and that could be problematic. But what do you expect? How do you want our future to be shaped? Innovation, including AI, requires tremendous amount of data. Suicide is a serious problem and being able to accurately identify that in the future could save tons of lives. Accurately diagnosing mental illnesses will take a while for sure, and I believe this is a necessary first step.

Now, if Facebook is selling the data for profit, that's another story. But if we assume that Facebook is acting purely for the benefit of the society and the people, I think this is a great step.