|Facebook Tracking My Movements With Breadcrumbs|
The knowledge that you're being watched changes your behavior (the antithesis of privacy). It's the Heisenberg uncertainty principle at the macro level. This doesn't only apply to smartphones since even a basic cell phone needs to be tracked by cell phone towers, but not with the same level of granularity as a GPS enabled smartphone.
This screen shot, from a few years ago, shows how Facebook tracked me, unknowingly, as I went to visit a high school classmate at Club M at the Grand Del Mar resort.
You can always turn off location services for an app or smartphone. But the cell phone towers will still have a good idea of where you're at. Tracking isn't only limited to web browsers as the woman in this podcast mentions (visit http://history.google.com to see the info Google keeps on you).
Note: This post is a follow up to the Facebook tracking privacy issues I first noticed about five years ago: