If a grandmother takes a photo of their grandchild in a bathtub this is technically against federal law 18 U.S.C. § 2252. There is no "I am grandma" exception. This is a serious felony with serious consequences. If you use an algorithm without any context I think you are looking at a ton of new 18 U.S.C. § 2252 (child pornography) charges through these scans. These charges are notoriously difficult to defend against and even the charge itself will ruin lives and careers [1]. Getting custody back of your child will also be impossible [found guilty or not]. I am getting my popcorn ready. Apple has no idea what they have unleashed.

https://www.nbcnews.com/id/wbna8161067

* edit: hahaha downvotes thanks apple employees!