Yes, this is complete BS. The backbone of all systems currently in use to block URLs leading to child abuse images is the Internet Watch Foundation block list,

Yes, this is complete BS. The backbone of all systems currently in use to block URLs leading to child abuse images is the Internet Watch Foundation block list, which is manually compiled by a small team of police-trained analysts. Companies providing the actual blocking services don't want to even see the URLs on the list (going so far as to ensure that it is encrypted at all times until the URLs can be safely hashed). They certainly don't want to download the contents and have them sitting (even temporarily) on a server somewhere.