What I will complain about though is the notion that privacy is the downfall. Using an OpenID type identity would allow me to log in with some default level of information sharing, and if the site wanted more info, they'd just put up a blocker signup page - just like they would if I had only an email. I expect that whatever data they get from OpenID they're going to stick into their own databases anyway, not expect the remote data to never change.
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