What are the benefits to users - save the difficulty of remembering their own parent's names? At one time, younger users were avoiding Facebook to avoid having public online conversations with parents. Danah Boyd has published on this topic, she would have a more informed opinion, http://www.danah.org/itscomplicated/

Perhaps Facebook could create a location where they could receive free technical advice on new product features and whether they would be helpful to their customers and society, with public votes and feedback? This could be done for roadmap features originated within Facebook and for user-generated roadmap requests.

As for privacy, is there economic value in DNA/SNA information harvesting by Facebook bots?