I am new to Geni and have just read the rules about family groups and private profiles. Yesterday I added my parents and grandparents to the tree and was very careful about making their profiles private, because this is what has worried me most about joining Geni.
This morning I received a message from a Geni user, who told me, my grandfather's profile should have been written in English default. She is probably right, but then I thought how does she know about my private profile? She is not family, neither a collaborator.