The problem is that everyone has friends who are unaware of what they’re giving free by accepting acces to the Contacts app, some time ago Facebook kept me reminding that I had to enter my phone number for a security purpose, I never entered it and at a certain point in time it suggested my phone number correctly by itself, probably because a few of my friends shared their contacts information with them, including my name and linked phone number, I’m not going to blame my friends for that, it’s just frustrating that it is possible for apps to let you share information without you even knowing what you’re doing, I think this is a good change for the App Store.