So this is what all this "kiss cam at Coldplay concert" is about. Pretty dull stuff.
One thing to note with facial recognition and security cameras is that you can't put the genie back in the bottle.
Another thing is that there are legitimate uses for extensive surveillance (catching spies, assasins and collaborators when your country is being invaded). While this is a somewhat extreme example, there are legitimate use cases outside of war time too.
It's up to us as voters to elect governments that do not abuse surveillance technology.