That's why Google hires people to curate their image database and flag illegal images, so that they can detect them automatically in the future. It looks like

That's why Google hires people to curate their image database and flag illegal images, so that they can detect them automatically in the future. It looks like Microsoft wasn't doing anything at all to stop new child porn. The fact that their recommendation engine pushes you further in the direction of pedophilia is proof enough that they weren't actively trying to avoid this kind of thing.