You should consider investing in a VPN (Yes, paid) which is entirely for the use of Torrent downloads.
However, this doesn't limit you to just torrents, but they're are based on that purpose.
Peerblock is good, but if you do buy a VPN, research into stopping DNS leaks inside Windows.
DNS leaks + Torrent VPN = Useless.
I use GNU/Linux everyday so never get dns leaks.
Sure enough, you might think "Well torrents are free, if I buy a VPN then torrenting is no longer free"
I thought the same, but I'd rather have protection than a 'Go to jail card'
It's well worth it, considering you can get 3 months, easily for under 15$.
Free VPNs are useless also, they don't allow P2P or heavy traffic (which is completely understandable)
Two Paid Torrent VPNs I'm aware of currently:
www.torrentprivacy.comwww.strongvpn.com << More expensive that TorrentPrivacy but has multiple server locations and connections (PPTP, L2TP, SSTP)