There was an interesting article in Inc. magazine a while back about a company that tried that. They found out that no sites wanted to use the service, even tho

There was an interesting article in Inc. magazine a while back about a company that tried that. They found out that no sites wanted to use the service, even though they saw how it might solve their problems, because it would immediately make their non-verified users less valuable. http://www.inc.com/magazine/201112/case-study-josh-levy-and-ross-cohen-of-beenverified.html http://www.inc.com/magazine/201112/case-study-josh-levy-and-...