"I'm as mad as hell, and I'm not going to take it any more."
That's the apparently immortal line from Network, Paddy Chayefsky's acerbic Oscar-winning masterpiece from 1976. Deranged newsreader Howard Beale (played by Peter Finch in the movie, and Bryan Cranston in a theater version) urges his audience to scream it out of their windows, and his TV network capitalizes on the resulting outrage. Nearly 50 years later, Beale looks ever more the mad prophet — not just of the airwaves, but of social media.