hello. yes, technically you got the point about proxies. no worries, you may use them for anonymization of your transfers. however, there may occure some transfer problems because of the sake of BT protocol which is designed to accept only one connection at a time from the same IP address. nonetheless, some clients have this option variable (like uTorrent) and you can enable or disable the allowance of multiple connections from the same IP address but also you have to be accepted by the other side. uTorrent in default is set to reject multiple connections. this shouldn't cause a big harm to a swarm, still in the theoretical model of all peers with the same IP address this would cause freezing of all transfers.