TV is the enemy in Fahrenheit 451. It’s responsible for replacing literature, intellectualism, and curiosity. On top of that, it’s become a substitute for family, friendship, and any sort of real conversation. The reason cited is "happiness." People are happier when they don’t have to think, or so the story goes. TV aside, technology is the government’s means of oppression, but also provides the renegade’s opportunity to subvert.
The restrictions on literature in Fahrenheit 451 represent the novel’s main concern : the perversion of the natural world by man’s use of technology.