I think the point here is that the notion of privacy is actually quite a complicated one. If you asked people in a cafe or a supermarket if they knew they were

I think the point here is that the notion of privacy is actually quite a complicated one. If you asked people in a cafe or a supermarket if they knew they were being videoed then they'd probably say "yes" and be able to point to one of several nearby surveillance cameras, but if you dismount the surveillance camera and hold it manually close to someone then the reaction according to these videos is usually one of surprise shortly followed by hostility. If the creepy cameraman keeps up his antics then sooner or later he's going to get arrested for stalking, and yet this kind of constant and very intrusive surveillance is going on online all the time, and with new laws it's probably going to become still more intrusive. Why don't people react the same way to surveillance cameras in supermarkets, streets, offices, etc or to the even more extensive surveillance online (think "warrantless wiretapping" or mobile phone geolocation data)? I think this is primarily due to anthropomorphic factors, plus habituation. The online and CCTV surveillance isn't "in your face" and invading your personal space in quite the same manner as someone holding a security camera. Plus, in the early days of CCTV introduction in the 1980s and 1990s there were some people who reacted badly to seeing cameras watching them in stores, but gradually over time society has just become habituated to that being the normative situation.