Some US states punish technicians that notice "child" pornography on a client's computer and don't report it.

Keep in mind that "child" includes teenagers of age 16 or 17, who in Massachusetts can legally have sex. It even includes women of 18 or older, if they look younger or have small breasts.

It includes photos that teenagers take of themselves having sex (but "only" 10% of them get prosecuted).

A law against possessing a copy of some sort of publication, no matter what kind that is, is tyranny and leads to more tyranny. It must be repealed.