A new study says TV isn’t bad for you. But Virginia Heffernan doesn’t believe it. “Television, after all, is the only art form reviewed in this newspaper that is also regarded as a public health hazard; maybe this news will help to clear its name and win it some respect. But I wouldn’t count on it. Study after anti-television study has failed to pinpoint the exact perils that viewers are prone to, and yet the idea that television is dangerous persists as an article of faith.”