Is it possible to turn off manual (standard Joomla) registration and force new users to use a social site to register?
I don't want users to be able to register manually. I want to force them to use either Facebook or Google (or any of the others in JFBC). If they don't have any such account then they can't use my site.
Can this be done with JFBC?
Yup. Joomla has a built-in setting to disable new user registrations. JFBConnect has no problem working with that setting and will still let users registers when using a social network. Better yet, you can still use admin or user (email) activation, if you'd like.
I hope that helps answer your questions, but should you need anything else, just let me know.
Glad we could help answer your question. If you have any others, or if you decide to subscribe and run into any issues configuring it as above, just let us know.