An excerpt from a letter written by the Lubavitcher Rebbe against TV:
In Lubavitch a Jew once came to his father and asked him: “Is it an accomplishment to sit in Lubavitch, closed in one’s room, and be a fine Jew? If one walks on the street in Petersburg, and doesn’t sin there – that’s an accomplishment.” He continued: “Even that is no accomplishment. Being in Petersburg, going inside the theater, sitting with one’s eyes shut, and not sinning – that’s an accomplishment.” Then the Jew went further: “Even that is not enough. Sitting inside a theater in Petersburg with one’s eyes open, and not sinning – that’s an accomplishment.” He continued further: “Even that is not enough. Entering the theatre, sitting near the stage where the performers perform, and then not sinning – that is a great accomplishment.” In this way he detailed an entire list of activities, and one can readily imagine how such a calculation can lead the person to fall to the lowest depths.