Facebook is not a community, it's a medium of communication. A sixth of all humanity is not a very useful group for social purposes.
Calling it a community with warrens doesn't seem like a useful description, to me.
Calling it a community with warrens doesn't seem like a useful description, to me.
This also works for every other website in existence, I think.
Facebook is supposed to be for everyone, so it's not really a group at all.