Hardly anyone noticed recently when Google introduced technology to filter out copyright violations on its YouTube video website. YouTube had been under continuous pressure from big media companies for hosting unauthorized clips. However, a recent move by AT&T to adopt similar technology across its whole broadband network is stirring up critics. AT&T is in discussions with Walt Disney and NBC Universal about inserting a 'content-recognition' system created by tiny Vobile Inc. directly into AT&T's Internet transmission apparatus to guard against improper distribution of shows and films by those companies. Critics argue that in assigning a gatekeeper role to a phone carrier to supervise a broad portion of the Internet, the system would pose a threat to users' privacy, equal access, and freedom of speech. Large Hollywood studios and TV networks would likely welcome such a system, which could create a kind of no-piracy zone where they could rest assured of getting paid for the use of their programs and films. Now that all types of information can be sent via the Internet quickly and easily, content creators are requesting assurances that their handiwork will not be stolen. News of more concrete plans is drawing criticism from privacy advocates. The general deal would involve Disney and NBC Universal agreeing to allow AT&T to maintain a database of some of their shows, movies, and other content. If AT&T could convince customers to allow it to monitor what they are viewing through so-called opt-in agreements, AT&T could collect far more specific information concerning the likes and dislikes of customers. AT&T and its content partners could then land lucrative deals with advertisers eager to obtain such data. While AT&T could gain customers by making exclusive content deals, it could lose others who don't want AT&T to act like Big Brother.