I am a block head about Twitter and that other one you asked about. I never heard of it.
However, goofy parents and grandparents expose details, photos of their innocent kids, times and places, and think FB is one big party. These are deadly times.
* I suppose there were those boarding those German trains who thought they were being taken on a scenic trip, too. *
Just saying.
Whatever you share on there is limited to whoever you want to see it. You can even limit to just one person. It’s not just on display in a shop window. If you know how to use FB it’s quite private. Unless it’s the FB employees themselves that you are afraid of.