"Eight months ago, content owners and Internet service providers (ISPs) agreed to the Copyright Alert System, a "six-strike" plan to reduce copyright infringement by Internet users. Under the system, ISPs will soon send educational alerts, hijack browsers, and perhaps even slow/temporarily block the Internet service of users accused of online infringement (as identified by content owners). At the time it was announced, some speculated that the proposed system might not be legal under the antitrust laws. Were they right?"