It's becoming clear to me that apps such as LinkedIn and Facebook must have gained access to my Mac/OSX/iOS iCloud Address Book - because they're suggesting friends/contacts of people who I've had only brief communications with, but their details are in my address book. What worries me most is -- how much of my OSX/iCloud address book have these corporations downloaded to their records. I can sort of accept if they get names off my address book. That's bad enough. But what if they also downloaded the "Notes" portion of my Address Book that could contain confidential information, even credit card details and bank passwords. Surely, when we place data into iCloud - which includes the OSX/iOS Address Book, the Apple customer (me and you) assumes that our information is confidential. That assumption, of course, is what we assume when we click that we have (not really) read those ridiculously long EULA's which we have to. I am concerned, particularly with the note section of OSX Address Book, if that contained confidential information, and people like Facebook and LinkedIn got hold of that.