The BMI is not an accurate test for many people. Sadly, it is fairly accurate for the majority of the people that this article was discussing, the majority of Americans that are overweight, overfat, and underactive.
It's a disgusting trend that continues to get worse. I find it a pathetic attitude to seek justification and acceptance of a lazy and unhealthy lifestyle.
The Biggest Loser is a hard show to watch, but the only thing more amazing than the condition of the contestants at the beginning is the demonstration that a willfull lifestyle change is all that is required to completely transform one's life (self-image, health, family, almost everything that matters) for the better.