Bobby, it is not only safe but useful, as well. Firstly, a VPN channel does not interact with the traffic of another device. Secondly, your Internet provider will identify mixed traffic but not a suspicious connection to a single IP address (the same is for VPN-banned countries). As for free VPN alternatives for torrenting, think about this: torrenting consumes a lot of traffic and P2P technology does not have built-in user protection, which means intermediary services are needed. Transferring traffic requires financial expenses anywhere on the Internet. Who is going to take on massive amounts of traffic for free? Do not waste time. It will be either prohibitively slow or unsafe.