Peer guardian blocks selected people/organisaitions from accessing your p2p files. It does not block the RIAA. It blocks ALL KNOWN informers of the RIAA, and there is a difference. Yes it is excellent and worth having. I just wish people would not come on the forums and say things that are not absolutely true, as if Peer Guardian makes you totally imune from getting caught.....
AFAIK there is no was to conceal your ip 100% If I am wrong someone will no doubt tell me
If you are sharing less than 100 files I would think the chances of your getting caught AND sucessfully prosecuted were less than minimal. If you were sharing 10,000 files and they were by all the latest stars, who put the food on the tables for the RIAA, you would, no doubt, not be so lucky.