The major issue to consider is what other Government agency's get access to the information, its certainly not something you want rammed up your ass via executive order.
If there's a bad man headed to the airport, why wait till the airport to get him? Let's implement bio scanning in traffic cameras and get them before they even reach the airport! then feed that info to local cops so they can arrest.
Seems smart, until you get pulled up because someone sitting in your back seat, had outstanding traffic fines from 1997 and the facial recognition finally got them.
or you go to a football game and find yourself arrested and removed over those late child payments you haven't made.
As for phones..
http://www.washingtonpost.com/wp-dyn...110700006.html
I told you guys many times the way they get around this in the USA now is by collecting the data here in Aus, if information is going via satellite, its logged and recorded at PineGap.
Hence why those that had accesses to the info... have been the most concerned about the Trump administration. However bringing it into a civil court is the difficult bit..