Slightly nutty fitness "guru" Michael Torchia has looked at Wii Fit, and as a slightly nutty fitness "guru", does not like what he sees. He reckons that, via "slick advertising campaigns", people are under the impression Wii Fit actually makes you fit, and are forgoing more effective methods of exercise in favour of Nintendo's product.
Nintendo is contributing to the epidemic of obesity. Young and old are putting away their gym clothes and shying away from going outdoors to play sports, because the addictive appeal to the Wii game products. Just as the tobacco companies created such a false image of their products and hid the potential dangers, so is Nintendo.
More info at Kotaku.