I'm with you on this one. People who are obese (BMI of over 30) have a 10-50% increased risk of death from all causes, compared with those of a healthy weight. Even if it's only 10%, that's high enough for me! Sure, the blood pressure/cholesterol might not get you, but the risk of diabetes complications, stroke, organ disease, cancer, and respiratory problems just might.

My BMI nearly hit 30 this year, which was a bad sign. After 25, your BMI should not equal your age!

On a totally unrelated tangent, that's my favourite XKCD, and every time I see your icon it makes me smile :)