Crafting and Far North, I agree with you. We are not stupid, we know GN is a public site and anyone can read it, if they bother to seek it out .... But if you're a younger person you're not likely to.
However all ages are on FB, it's much more likely a younger family member could come across a link, and realise it sounds very much like their current family dilemma. Some people in their distress give a lot of personal info, enabling family members to identify them.
HQ were sharing these type of posts particularly on FB. Without any care for the consequences. Well unless things change, most won't dare ask for help now. Not exactly what the Jo Cox Foundation had in mind I'm sure.