I'm really not sure what point you're making here. Everyone will be affected differently by these rules as subject to their scenario. There's no way to make a general statement by Facebook for their entire 1B+ user base.

I do believe for the vast majority it does make things safer but if YOUR particular situation is different, then yes, use privacy settings, or dont be on Facebook or dont be online at all.

All the blame here seems to be toward Facebook somehow exposing information when every single step of that information getting out there is completely voluntary and has a massive amount of privacy control available.

Failure to use the right service in the right way rests on the user, not the service.