Sorry if I am bugging you too much, but there is one other question I have. For any given event, the user has the ability to send invitations out for the event. Currently, all of the members in the directory appear on the 'Send Invites' section. I saw that you are using the get_inviteable_ids() function to put this query together.
What would be the easiest way for me to limit a user's ability to send invites to just that user's friends? We prefer that users can't invite all the users on the site, as this list is going to be quite large.