The thread centers on a report (from Stanford Law School’s Center for Internet and Society, summarized by Threatpost) claiming that many online ad networks continue using web tracking cookies even after users opt out of behavioral targeting, raising concerns that industry “do not track” commitments aren’t being honored. The key question implied is whether firms actually remove tracking cookies after opt-out signals; the cited findings say only about half did so, while some placed or retained cookies even after opting out. Overall sentiment is skeptical and critical, framing the results as evidence that voluntary compliance efforts are insufficient.