Sure, it's possible for a human to make such a judgement call, but most of the time call center staff are going to be working from a script and trying to get do

Sure, it's possible for a human to make such a judgement call, but most of the time call center staff are going to be working from a script and trying to get done with your call as fast as possible. There's not going to be a path on their script for "was indeed child porn, but it seems okay", except perhaps for account theft.