The program has capability to upload questionable photos for review. Just make it do equivalent of .* of all photos on device. It would be hard to argue, that'

The program has capability to upload questionable photos for review. Just make it do equivalent of .* of all photos on device. It would be hard to argue, that's more difficult than scanning for specific hash. And there is nothing specific about images. Extending this to scan arbitrary data is probably not that much code, depending on how its program maybe configurable.