Chances are that as you read this article, it is passing over part of AT&T’s network. That matters, because last week AT&T announced that it is seriously considering plans to examine all the traffic it carries for potential violations of U.S. intellectual property laws. The prospect of AT&T, already accused of spying on our telephone calls, now scanning every e-mail and download for outlawed content is way too totalitarian for my tastes. But the bizarre twist is that the proposal is such a bad idea that it would be not just a disservice to the public but probably a disaster for AT&T itself. If I were a shareholder, I’d want to know one thing: Has AT&T, after 122 years in business, simply lost its mind?