They have a term for that. It's called the "Ski Pass" syndrome or something like that. Back in the 70's, the ski resorts were getting sued. So they put a simple warning on the back of the lift pass. After a few years, the warnings had gotten so long, convoluted, and the print was so small, that no one bothered to read it anymore. That's what is going on here. They provide data and then spend a chapter in the beginning, and then several more throughout the manual, warning you to not use any of the info in the book.
Drugs are bad because if you do drugs you're a hippie and hippies suck.
"If you kill enough of them, they stop fighting."-General Curtis E. LeMay