[soundwave106]

Honestly, if they stored evidence collected from previous cases, the data probably already exists in some form. As long as the data was closely guarded internally, I'm not sure if there would be an ethics problem using this for training.

The biggest problem with obscenity detection, though, is getting the context right. The AI might be able to get to the point where it can detect "naked human" at a good percentage level. At the moment, however, I doubt it could detect whether the naked human was considered obscene in current culture, eg: the difference between "child pornography" and "famous Vietnam War photo" as alluded to in the Gizmodo article. So no matter how good their model gets, without further refinements in AI it would only be good for a "first pass", I would think.