Not a bad idea. Cause those skinny people would like to compete as well. You should judge by bodyfat percentage. It's more accurate than weight or that damn BMI (Body Mass Index) which would say that a 300lb bodybuilder is morbidly obese. I was on the ABs Diet for about a month and lost 20lbs. All while eating 6 meals a day and about 1500-2000 calories a day. I got injured at work and was on light duty for about a month and actually, to my surprise, only gained 10lbs of it back. I need to get back into it, though. I'd strongly recommend looking into that method. My girlfriend was on a "diet" of 500-1000 calories a day and didn't listen to my warnings about her health (she's an RN and I'm a Medic). Well, she finally started listening to me when the doctor said her white bloodcell count was low and she was about to go into kidney failure.

You can get The Abs Diet book at any bookstore for about $6. It's well worth it and has loads of information for a measly six bucks.