The RIAA is not some all powerful government organization or such, it issimply to music what the SAG is to movies. It's kinda a union-esque organization, handling licences, royalties, and certifying gold and platinum records. Their power is their ass-loads of money and law force that the media would have you believe could indict and sentence O.J Simpson without breaking a sweat. So how does one fight back? Well the first ideas that come to mind are contacting (and eventually mass protesting) to change existing piracy laws that are being used outside of their original intent. We need to make sure the laws that govern us are crystal clear. You
cannot steal a CD from Tower Records. You
can record a song off the radio. Changing laws is as simple as getting the attention of the state assembly (or house, depending on the state). If you're in California, like me, I'd suggest having you and 10,000 of your closest friends write to Kevin McCarthy (majority floor leader) about the end to the RIAA witch trials.
It's worth mentioning that the RIAA has sued approximately 13,000 people in the United States suspected of sharing copyrighted works, almost all of them unsuccessfully (according to wikipedia).
http://www.boycott-riaa.com/