In all seriousness, television has almost certainly harmed some not-insignificant fraction of our population. Nothing is more toxic than a bad idea, a malmeme, and some of them can be so subtle that they go unnoticed for years or decades. Ironically, music is probably less pathogenic, there's just less bandwidth for these memes to make use of. Lyrics, moods, and a single picture of album art? Compare that to a half-hour time slot with complex depictions of social interactions that humans model their own internal mental state from.

Everyone on every point of the political spectrum claims that the basic principle is true. That we can be manipulated to believe untrue things and to behave inappropriately and in maladaptive manners. We just tend to disagree on which media and which content does so.