It's because when we say being observed in public, we assume it to be someone looking at us and then basically forgetting all about us. We don't think about security cameras watching us and having a single party aggregate all of that. And we don't know our cell phones are broadcasting a unique barcode to everything even if we do know the cell towers can triangulate and log our location. (By we I mean our family members, not us on HN.)
Adding technology to the observation makes it so much stronger that I think there should be a new discussion about it by our various governments.
