I have choosen to not post much on facebook because of my professional life. I don't want lurkers or my students trying to see me outside of our academic world. I am a member of a closed Facebook group of quilters. We are all from the same guild and our group does require the approval of either of our guild leaders. WE have just a few who have been allowed to join that are not guild members but who are quilters. This site is primarily for communicating and posting of photos of our accomplishments or reminders to the whole group. For me that is good enough.
I joined another Facebook quilt group and because it was so large, my mailbox was always being filled up with messages about this and that that had nothing to do with quilting. Dropped out and don't miss the site at all.
If you don't want your photos out for the universe to see, then don't join this group. I understand that they want real quilters only but..... It is always your choice.