God Bless Referrer Logs
"The point is, the '400,000' study did not get an enormous P.R. push because of scientific merit. There was an idealogical need to trumpet a study proving that fat is 'the new tobacco'; and by serving the needs of ideology rather than science, the CDC put itself in a position where it deserved criticism... The huge publicity given the '400,000' did have a scaremongering effect; it encouraged a level of anti-fat hysteria unjustified by sound science. ('Hysteria' is the correct word; the director of the CDC called fat worse than the black plague.)"
If you're at all interested in the scientific debate about weight, there's a lot of food for thought in here.