If you’re going to download torrents, use it. No questions. Peerblock picked up where PeerGuardian left off, it’s the same concept, block bad IP’s and IP ranges. A must have for keeping out spam, spyware servers, govt, universities, and certain countries out of your connections.
I am not advocating downloading of copyrighted material.
“PeerBlock lets you control who your computer “talks to” on the Internet. By selecting appropriate lists of “known bad” computers, you can block communication with advertising or spyware oriented servers, computers monitoring your p2p activities, computers which have been “hacked”, even entire countries! They can’t get in to your computer, and your computer won’t try to send them anything either.”
You can also block IP blocks and certain countries by adding specific lists from http://www.iblocklist.com/lists.php