Hello,  I'm trying to determine what my options are in NationBuilder for communicating with supporters for whom I only have a Facebook identity and can thus only message on Facebook.  These are people who have rsvpd for an event linked to my Nation on Facebook - they have not necessarily liked my Nation's main Facebook page and I do not have an email address, phone number, twitter handle or any other means of contacting them.

Can I set-up some sort of automated way of messaging all new supporters through Facebook or sending the same message to a batch of supporters?

Thanks!

Spencer