And by "TV" they mean "Milton Berle," and by "fine," they mean "didn't lower their performance on standardized high school tests forty years ago."
In order to get a control group of kids who actually didn't watch television, two University of Chicago economists [and really, is there any other kind?] went back to the market-by-market rollout of television in the 50's, and then they tracked the grades for that first TV generation. Their conclusion? No harm, no foul! Let the kids watch The Wiggles all he wants! Seriously.
My conclusion? If the phone ever rings at 5AM at those economists' house, it's not Stockholm with some Big News; it's the Freakonomics guys demanding their schtick back.\
The Benefits of Bozo: Proof that TV doesn't harm kids. "The Wiggles: What are they doing to your kid's brain?" [slate.com, never mind that absolutely none of these headline/captions is supported by the article itself, much less the findings.]