facebook's privacy issues

Let me make this point clear with an example. I met a teen whose abusive father was recently released from jail. Recognizing that a restraining order would not be enough protection, the teen and her mother moved thousands of miles away. As the teen began making friends in her new school, she begged for a Facebook account. Her mother caved and both the daughter and mother worked to make the account as private as possible; neither of them wanted to face the consequences of being found. In December, when Facebook changed its privacy settings, this teen and her mother didn't realize what the change in privacy settings meant until someone else pointed them out after the fact. Is putting her at-risk an acceptable bi-product of Facebook's changes?

-- http://www.danah.org/papers/talks/2010/SXSW2010.html