I don't think that there is any reason to use Sync for that reason. Normal private torrent trackers do that fine, and are just as secure as using Sync: To DL .torrent file on a pvt tracker: Are you a member of the private tracker? To find out 'secret' on forum: Who has privileges to see those forum posts? I do think that a possible use of Sync for piracy could be sharing between friends or families (especially since the software is free and easy to setup). This would make sure that nobody else (anti-piracy groups) would be snooping on your swarm. Another attractive feature of Sync is that the connections between peers are secured with 256 bit AES encryption. Correct me if I'm wrong, but this means that the ISPs of everyone syncing in your "network" are unaware of what is being sent, but they do know how much data and when it was sent. Of course, this is not the purpose of Sync. It acts as a great DropBox alternative.