My app needs to generate a list of friends for the logged in user, as well as the friends of the friends. The logged in user has authorized the app. So I have no trouble getting their friends. When I make the /friends/ call to the API using one of the friends' IDs, I get this error message:
Can't lookup all friends of [FB ID]. Can only lookup for the logged in user or the logged in user's friends that are users of your app.
I knew that the public visibility of one's friends is a configurable setting for each individual user, but if I understand this message correctly it means that you simply cannot do what I'm trying... ever.
Question #1: Is this true? Is there simply no way to lookup someone's friends' friends? Question #2: If it's not possible, how do sites like Glassdoor.com manage this exact functionality?