[Nasrudith]

It only filters images already there - child porn isn't already among the chaff only thing it can find by definition would be false positives. Which could be an interesting vetting exercise in itself - feed in tons of cat pictures until it dings on one as inappropriate.

Technically you can always try cycling through image combinations match the hash/looks like child pornography and nothing could technically prevent it except that it would take a very, very, long time.

Even given adversarial networks I would be very surprised to get anything more than vague figures and I don't even expect the result to look human. In which case it is really generating instead of finding.