If a member uses Facebook to login, what information should it bring over from Facebook? Should it carry over their birthdate, location, ect?

Same question for Google+, Twitter, ect.

Also, is there anyway to tell what members signed up using Google+, Facebook, ect?

Thanks!

In the ACP under the Members, you will see next to the user whom registered with a Social Networking account. I set my forum to make such users to make live posts while others are moderated until I can tell they didn't registerrfegister to spam.