So let me get this straight. Advertising networks that track user behavior are OK with “Do Not Track” only so long as a single-digit percentage of users have it turned on? But if a lot of people start using it they’re out? Not being able to track users across the web is a “nightmare” for ad networks?
Years ago I had the idea that if Microsoft really wanted to destroy Google, they should have released a version of IE with a built-in on-by-default ad-blocker that included Google ads in its blacklist.