This would work if cookies was the only way to track people. There is also localStorage, ETag (and other cache-oriendted methods), fingerprinting, owning a brow

This would work if cookies was the only way to track people. There is also localStorage, ETag (and other cache-oriendted methods), fingerprinting, owning a browser, etc. What we need is a low that forces websites to obey the "do not track" header.