London's just an example. Many other cities are the same, and every year more and more cameras are installed in more and more places all over the world.
Video surveillance is just one example too, web tracking, tagging people in photos, facial recognition, email surveillance, spyware, workplace surveillance, profiling of various kinds, and much more is getting more and more prevalent as the technology that allows it becomes more sophisticated, cheaper, and widely available.
Yes, you could try to move to more and more rural locations, further and further away from other people that might spy on you, disconnect yourself as much as possible from the internet (as Stallman has), and maybe, if no one powerful or knowledgeable enough cares about you, you might sneak under the radar and be free.
But what about your kids? What about your family? What about your friends or the rest of society? Most people aren't willing to go to such extremes, even if they have the means, knowledge, and care enough to do so.
No. The solution can not be individual. That's failed for decades now.
Collective action must be taken. Not violent action, but legal and financial action, and educating more people about why it matters and what they can do apart from trying to run away.