That makes me wonder what "anonymous" actually means. As I understand it, Google anonymizing the logs in fact means they don't store any information that can le

That makes me wonder what "anonymous" actually means. As I understand it, Google anonymizing the logs in fact means they don't store any information that can lead directly back to you: as in, based on a single log file, they couldn't say who you are. In the greater context of things, however, it is not anonymous: based on your previous access patterns, and your current (< 18 months) access patterns, they could link your anonymized logs with your unanonymized logs. Is that still anonymous then ? This all reminds me of some research from Germany I heard about a few years ago: basically, if you have someone's ZIP code, age, gender and education, you can get a > 99% accuracy resolving who this person is in real life.