As the Admin. Of my family research, When I add a member I thought they couldn't edit the work on the site? I had a member edit a entry on the site yesterday? The good thing is he is a cousin who I asked to join to make sure my Info. was correct.
Family sites are meant to be collaborative so by default, the site members that you invite (not just everybody) *can* edit the information and improve it. If you are not interested in them changing anything, please instruct them not to do this, either in the welcome message of the site, or by sending all site members a message (via Home > Site Members > Send e-mail to all members). There is also a setting that prevents site members from making changes so only you could make them. It is not working properly and we intend to fix it soon.
PS: you posted this item in the wrong place in the forums. It will be moved soon.