My understanding was the FP risk. The hashes were computed on device, but the device would self-report to LEO if it detects a match. People designed images tha

My understanding was the FP risk. The hashes were computed on device, but the device would self-report to LEO if it detects a match. People designed images that were FPs of real images. So apps like WhatsApp that auto-save images to photo albums could cause people a big headache if a contact shared a legal FP image.