Yes, but you can certainly automate the process to a large extent. For example, many sites simply don't have the functionality allow copyright infringement. A

Yes, but you can certainly automate the process to a large extent. For example, many sites simply don't have the functionality allow copyright infringement. Also many sites will have >99% false positives, whereas torrent sites will have >99% true positives. They could hire a few people to get through as many computer sorted reviews as possible, and the rest of them fall through the cracks.