I've seen it debated on various forums, whether PeerBlock (and other IP (as in
Internet Protocol address) blocking software) is useless or not. The main reason it is argued to be useless is that people use it to protect themselves from corporations snooping around for IPs that are sharing their [partners'] intellectual property through torrents, while these interest groups will still get IP addresses from the trackers you connect to. Whether they and your ISP cares about your privacy regardless of seeing you as a distributor (seeder) or not connectible is a different matter. The fact that anyone might connect from unblocked addresses is also used as an argument, although I don't see this as a good one, since you've already made their work harder for them in that case.
I personally wager high that it's not
useless in terms of guarding oneself from undesirable IPs connecting to your computer. Of course, the program is useful as an IP blocker, but I'm thinking about the pre-constructed lists (iblocklist.com) in case that was not obvious.
The question is, however, is it doing more good or harm? Using PeerBlock, you'll naturally use the anti-P2P list, which includes dozens of corporations regardless of them actually being anti-P2P or not. All in all, I'm blocking 776 million IP addresses right now. I am fairly certain that I'm not really being targeted by anyone in specific, and while it is just another layer of security, it keeps blocking addresses constantly. It's obvious that most of them are just regular people that happen to be behind a blocked IP range. In addition to this, there's the issue of blocking legit companies, adding some work in figuring out what ranges to allow for your computer to work normally. Luckily, some IP lists have been made for certain popular service providers (Valve's Steam for instance).
tl;dr:- Is PeerBlock worth the effort?
- Is it effective as a general IP blocker, or does it block too many legit connections and virtually no undesired connections?