Why do they need a human representative to hash the image? I don't understand why this can't all be done automatically. Creeps me out that a real human would see intimate pictures before they block them.
Granted I really wish this was all done on the client so Facebook didn't gain access to the images themselves but I'm not sure of a good way around it to verify the image is something they should remove and not an abuse of the system.
Since that will be very rare case why not make that the human-required step?
Report, report, report, report, report - you know someone will do it, or make a bot to.
Or they would need to put actual effort into developing a novel solution to a new-ish problem. But they're a large incumbent, so...no.