Nielsen never actually knew what you were watching though. They had to take your word for it. The comparison would be if Nielsen had trackers on your eyes and cameras and microphones in your house. I do agree most concerns about data collection are overblown, but that doesn’t mean opening yourself up to any and all data collection is wise. And to act like there’s never an issue of companies taking your data for ill is laughably naïve IMO. If nothing else, unnecessarily sharing personal data exposes you as a larger target for things like identify theft.