Ingenious unbelievers.

I came across this in a book I was reading and should have noted down the reference, but I didn't:

Back when the Comstock Laws (banning use of the mails for obscene materials, I think) were passed (back in the 2nd half of the 19th c., I think), some "freethinkers" (a.k.a. unbelievers, the atheists of that time) tried to prevent bibles from being mailed, because of all the obscene incest, warfare, and drunkenness in them.