It sounds like you have Settings -> iCloud -> Backup -> iCloud Backup turned on.
> They are collecting and analysing PII data all the time.
What sort of evidence do you have to support this?
http://www.imore.com/yosemite-ios-8-spotlight-and-privacy-wh...
Yes, they say they properly anonymize and location-scrub this personal information before they store, aggregate and analyze it (and I have no reason to doubt that they're doing that, at least for their own use), but they are clearly collecting it. And if you're going to talk about things like vulnerability to government surveillance, just collecting it in the first place is more than enough to open that door.