Re: 1 in 5?
By coincidence I was listening to one of Tim Harford's Cautionary Tales podcasts last night and Darrell Huff's name was mentioned. It appears that after his bestseller, he blotted his copybook by siding with the tobacco industry...
"Huff was later funded by the tobacco industry to publish a follow-up to his book on statistics: 'How to Lie with Smoking Statistics'." (Wiki)