When will people learn
"which among other things calls Facebook a "trusted environment for people to interact safely" and says company officials "have invested heavily in building safety and privacy controls into Facebook"."
Trusted by whom? Just because your company has invested in safety and privacy controls does not make it a trusted environment or a place where people can interact safely. Prisons have invested heavily in safety controls, but you'll be hard-pressed to find someone who says they're a safe environment.
When will people learn that the Internet is not a safe place? Life is not safe. Why would you expect the Internet to be any different? The Internet is simply an alternative communication medium. It is no more safe than your phone (probably less so). Do you expect your phone company to proactively block harassing phone calls? Do you expect your phone or phone company to warn you if your 14-year-old child says something they shouldn't have or speaks with someone they shouldn't have? If not, then why would you expect an Internet service provider to do so (whether that provider provides your communication line or a service such as Facebook)? No technology can accurately and reliably proactively protect you from yourself.
The Internet is not safe. Life is not safe. It never was, and it never will be.