I hope that our courts in western democracies are strong enough to stop these developments, but I fear they ara not. Once this kind of stuff is being attributed to (even completely unproven) "higher security" or "national security", and once secret services run the software and identification routines, it will land in the same extra-legal space as internet mass surveillance already lives in: "No no, we're not doing that. Okay, you got us, we're doing it, but only in limited scope. Okay, you got us, we're doing it on everyone, but it's important for national security and we can't disclose anything else". And that's usually when nothing can be done anymore about this, and laws and ethics will be outmaneuvered.