Edward J. Black: “You are talking about a surveillance, monitoring capability which can be very detailed, very intrusive.”

If we go to the concept that the data used by technology companies to perform their functions are just business records, then a massive amount of information about everyone becomes available under a lower standard.

If we don't establish firm guidelines to indicate that our private information is still private, even in our increasingly digital and interconnected age, Americans will end up forfeiting rights that we have held dear for a long time.

The amount--what you learn by being able to monitor precisely someone's location over a period of time can reveal all kinds of sensitive things.

The level of intrusion, unwarranted and unconsented intrusion into people's private affairs--their location, their sensitive data, a variety--is something that we need to guard against.