How does this work? I thought the whole idea of the torrent protocol was to prevent identification of who downloads what.
The purpose of it is exactly to help you find other peers with the same content. It's a bunch of peer finding protocols on top of each other. Trackers, DHT, peer xchange, etc, etc
I mean, the data itself is all hashes, but very public hashes. Unless you hashed it yourself and shared only the hash ever, the reverse hash is a websearch away.