That's a hugely misleading comment.
You can opt out of receiving location-based ads, but you cannot opt out of sharing your location. Just read the terms of http://support.apple.com/kb/HT4228 carefully.
You can opt out of receiving location-based ads, but you cannot opt out of sharing your location. Just read the terms of http://support.apple.com/kb/HT4228 carefully.
If you prefer a more granular approach, all apps (including Apple's own), allow you to disable location services for that app alone. In addition, all 3rd party apps, on first requesting location data, require the user to explicitly opt-in.