Heard this argument a million times before, and it's still wrong anyway, not the point and not the place for that kind of discussion...
But if you decide to use a VPN for torrenting, make sure you do it properly. Connect to the VPN before you start the torrent, and make sure you terminate the torrent once it's finished before you disconnect from the VPN again. Don't change VPN servers while the torrent is downloading to avoid an IP leak. If the VPN provider has a kill-switch, use it.