Well, quite simply, you can anonymously[1] discuss things with your Facebook friends (or the whole world, if you'd like).
[1]: That is, apart from the login and pulling in your list of friends so as to populate your "Friends' feed", we don't use Facebook IDs or names at all.
[1]: That is, apart from the login and pulling in your list of friends so as to populate your "Friends' feed", we don't use Facebook IDs or names at all.