Is your iPhone watching You?

So dig this, o Interwebs: I just learned from an article I am editing that mobile devices often track where you are without your knowledge or consent. "For iPhone users interested in seeing how powerful such sources of evidence can be, go to Settings / Privacy / Location Services, then 'Frequent Locations' to see a map of your most frequent locations. Many users are often unaware that such data is, by default, being automatically collected." Holy Big Brother Apple, Batman!