It is how to "cook the books" on the cost in blood of "social network". Teenage girls with gross depression are committing suicide at like 60% higher rate when they are active on social media. Facebook is absolutely a contributor there, and in order to disguise its actual complicity, its being a root-cause, it is now searching for clear signal of likelihood of suicide, with an attempt to ... what. What is their follow-up action? Inform a parent or legal authority? No way. That makes them culpable. They aren't going to "help". They are going to hide. They are going to destroy chains of evidence in on the "wall" or "messages" that point a clear finger at the paradigm as the problem.