The fact that ISPs are working with the RIAA in a bid to squash piracy is far from new. A leaked document claiming to be AT&T training materials, however, suggests that the operator is about to stop talking, and start doing. According to TorrentFreak notifications will be sent out to customers on November 28th about the change in policy, with those suspected of illicit downloads receiving an email alerting them of the possible copyright infringement. We’d previously heard of a six-stage notification system, and this, too, is mentioned here with repeat offenders facing access to “many of the most frequently visited websites” restricted. Even stranger, is the talk of having to complete an online tutorial about copyright to get the restrictions lifted. As AT&T is part of the MPAA and RIAA-backed Center for Copyright Information, it’s likely that the other members (Verizon, Comcast, Time Warner Cable and Cablevision), will be prepping similar plans. We’ve asked AT&T for confirmation directly, but for now keep an eye on the mail.