Comment by daten

I agree. This is an important thing to realize. It's also not just analytics. Every site that links to advertisements controlled by google or one of the many advertising companies they've acquired can also be used to correlate data about you. I started worrying more when they bought doubleclick.net. I wonder if that same google opt-out cookie works for those sites? What if you're concerned about your privacy enough to clear your cache and cookies every time you close your browser? Google is in a stronger position to track more of what you do on the net than many people may realize.