This is a first step toward regulation. No PRC-style indiscriminate/"predictive" profiling, as a first step. Now let's come up with a way to use this tool to ca

This is a first step toward regulation. No PRC-style indiscriminate/"predictive" profiling, as a first step. Now let's come up with a way to use this tool to catch actual criminals when investigating actual specific crimes, with judicial oversight that protects our civil liberties without making the tool useless (by creating onerous obstacles to its use, or delaying it unacceptably).