Should be disabled when using social login addon

[barocsi]

It creates malformed uris since there is no email hash present.
https://site.com/?ui=171&validate=

[andrewlimaza]

This will require a bit more work to integrate the Social Login and Email Confirmation Add On. This is pushed back to a future release.

If you would like to use the Social Add On, there may be some custom code to just automatically validate a user at checkout through some hooks. I think a guide/gist for the interim will be a good enough solution.