I think we've had enough ads about how books make you smart and tv makes you stupid to know that whatever is cool and enjoyable is more likely to win in that crowd, no matter what well meaning parents and teachers and PSAs try to tell them.
I think the "TV makes you dumb" propaganda worked just fine over time, and in big part because it was honest and non-aggressive (as opposed to something like DARE). I know it is just anecdata, but out of the people in their 20s that I know, very few have cable, and those usually do it because with their provider it is cheaper to have it bundled as opposed to internet alone.
