If you had a list of all the books I've read in my whole life, then that would give you a pretty good idea of what kind of person I am, and what I'm interested

If you had a list of all the books I've read in my whole life, then that would give you a pretty good idea of what kind of person I am, and what I'm interested in. There are plenty of examples throughout history and around the world, of governments harassing people they don't like. Of course, as of right now, this kind of thing is not a huge problem in most Western countries. However, governments sometimes change, which is why it's bad to have those kinds of databases sitting there. For example, if I had lived in Chile back in the 70s and bought lots of books on socialism, I may have gotten in some serious trouble after Pinochet took over (if such databases had existed back then). Or if I had lived in Lithuania in the 30s and bought lots of books on capitalism, I guess Siberia would have been my next home, when the Soviets took over.