[ Security ] Open Question : Does Amazon.com have a social sign-in feature?

Hi, I am building a site and trying to prevent users from creating fake profiles. I know that Twitter and Facebook have social sign in tools designed to help website owners prevent fake profiles. However, I can set up a fake FB or Twitter account easily, and then sign in to another site using that fake account. So it defeats the purpose a little. It seems that Amazon could have a better solution because if you make a purchase, then you go through a bunch of CC checks, etc. Any idea? Thanks

Source: http://answers.yahoo.com/question/index?qid=20110516175856AADrahO

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