I'm astounded
at why they think anyone would have accepted such a fuckwitted idea. Hasn't anyone learned anything from Facebook spraying personal data everywhere like an elephant with diarrhoea?
My wife came up with a list of reasons (say you're a teacher, or some other job that works with kids etc.) but my reaction was "Do you really need us to tell you why this is a bad idea?"
In other news, Blizzard's ReadID plan (show your friends your real name in exchange for being able to chat cross-server) is also a bit bananas. Your friends' friends can also find out who you really are - and add-ons can share your real identity without you having any RealID friends!