I don't know that you have any data on that second section, but it's still worth pointing out that a great majority of apps that import your contacts through a

I don't know that you have any data on that second section, but it's still worth pointing out that a great majority of apps that import your contacts through a contact book allow you to pick and choose who you want. And there's no reason why PIN codes and contact imports can't co-exist. It's a pretty big oversight on BBM's part.