I don't think anyone is disputing the fact that there's a lot of dumbness around. But, as Patrick says, we'd like to see some evidence that people are actually dumber now than they were in previous generations. Remember that one of the things about mass media and the Internet is that they allow people to be visibly dumb in ways they never could be before.

And in any case, even if people are dumber, putting the blame on TV and surfing the Internet is just, well, dumb. If, as you say, certain political groups are cultivating anti-intellectualism, then that is their fault, not the fault of the medium they use to transmit the message.