I just uploaded a small GEDCOM with a few more of my relatives who weren't in the first one and I had my first experience with privacy strangeness.
It was the descendants of someone I already had there, so I figured I'd export them with one parent, merge the parent, and everything would fall into place. Not so! I'd had to manually connect them all to their mother, despite the fact that their father was her only spouse, then the privacy issues started.
I finally figured out that I couldn't make them "Public" because their mother wasn't. How she got that way remains a complete mystery to me. Then I could only make MOST of them public.
I finally figured that one out. If they're under a certain age (about 100, I think) and show no date of death, they can't be made public. I finally figured out that, rather than putting in a fake date of death, you can just click "about/uncertain," leave the date blank, and then make them public.
On the other side of the privacy issues, it seems that anyone born before about 1700 gets locked into "open." Anybody can edit them? That doesn't seem like such a good idea.