No, television does not have a malign influence on society. Television certainly influences society, but so does all media, and over all, media has a positive impact on society as it brings people together in many ways. Television, as a form of media does this. So television's impact is positive, not negative.
Television has supplied some of the most beautiful artistic expression the world has known, particularly in the last fifteen years or so. Beautifully written and acted dramas including The Wire, Breaking Bad and the Sopranos are rightfully considered masterpieces. Television makes it possible for millions to simultaneously view those masterpieces at a relatively cheap price.