[nanodano]

Have you ever looked at Google Analytics information? They don't even give you individual IP addresses or anything like that. They actually do a GOOD job of anonymyzing data like that. You could track more information if you did it by yourself without Google Analytics. It's not really a big deal for someone to track what languages and what browsers people use on their sites.

[chr4]

The problem is not what the site owner is able to see, but what Google sees. And it collects information about every site you visit, every article you read. It has access to all other information, like your browser fingerprint, etc. It does this even without being a Google customer - If you are, it get's worse - It can correlate it with every mail you get, every term you search, every step you take. This is a fundamental problem, and the magnitude is incredibly scary.