I know your HN username is "noisy_boy", I can track your HN posts/comments but I have no idea who you are, where you live, etc. That's how anonymized data _can

I know your HN username is "noisy_boy", I can track your HN posts/comments but I have no idea who you are, where you live, etc. That's how anonymized data _can_ work. Of course it's also easy to mess that up and leak data about the underlying person.