Any country with CCTV or public surveillance (perhaps satellite?) could use FB's pics and Face together to track who's where and when. It'd be a synergy for surveillance, I just wonder who's got the best technology to do it.
As for satellite surveillance - even if modern military satellite imagery had that kind of resolution (it doesn't), and ignoring atmospheric conditions (a bit hard to do for the UK), it's hard to imagine how they would do face recognition from the tops of peoples heads.
With all due respect, your paranoia is misplaced.
[1] http://www.guardian.co.uk/uk/2011/mar/02/cctv-cameras-watchi...