Reminding the South African (& all) users to be careful that you trust the person from whom you accept an ordinary Collaboration request,
and NEVER TO accept Family Group Requests unless you are happy that the person inviting you can then edit or merge on your immediate family. (Your Mom, Dad, Granny; kids etc)
Remember that being in the family group of the manager of a standalone tree also gives a PRO user the power to merge that standalone tree with the Big Tree.
See this project for more info http://www.geni.com/projects/index/12429