What happens if someone spams CP via iMessage to their enemies? Additionally, this isn't just a hash of the file but a perceptual hash on the image content. So

What happens if someone spams CP via iMessage to their enemies? Additionally, this isn't just a hash of the file but a perceptual hash on the image content. So e.g. changing a single bit in the image would create a different cryptographic hash, but generally not a different perceptual hash.