Comment Re:What makes this different from security cameras (Score 1) 130
This is a false analogy.
First of all, cameras only record your appearance, and courts have always held that you have no "reasonable expectation of privacy" as regards to your physical appearance while in a public space. In contrast, cell phone location data can reveal private intimate details like visits to a doctor or a psychiatrist even if you are not a suspect.
Second, a camera is a fixed point in space, and only happens to capture people who happen to walk past it. On the other hand getting location data from a cell phone tower requires asking a cell phone company to go through their entire database of millions of people to see what users happened to be in a particular area.