Hmm, this thread has taken an interesting turn.
I'm not in any way concerned about LEO use of this technology. What does worry me is the ability to use this data to to compile yet another databse of info about individuals. Right now the one thing we have going for us is that FedGov is still incompetent about sharing and compiling all the data they accumulate. What worries me is that sooner than later some bright guy will manage to actually interface all the various acquired info. When that happens everything we do, everywhere we go, all our spending, all our bad habits, everything...will be available to those within our government whose job it is to make sure we are good and productive citizens. Whatever that means.
Really, I'm not so much paranoid as cautionary. Modern life with this many billions of people on the planet will only get more restrictive.