Even if I turn off location services, or opt-out sharing my location, contacts, history... who really knows whether those choices are ignored. It's like the office thermostat that everyone tweaks, but which is unconnected to the HVAC control system. Can we actually believe Apple/Google/Microsoft/Facebook/etc., etc?
This is akin to those knee-jerk "think of the children" campaigns to rid the world of unassailable encryption. Humbug.