Your wallet is a tool for change.
Sure is. ;)
Joking aside, I have to agree. I haven't yet taken it to the extent you have. I still have my old music and movies but I don't buy anything new. It was never really a conscious decision against the RIAA or MPAA for me, but a result of a growing dislike towards money-grabbing/useless corporations generally. (For me this not only includes companies that don't provide value for money, but also those that treat me as a stupid consumer.)
I'd like to send these associations and the companies they represent the way of the Big Three, which would hopefully knock some much needed sense into them. The problem as I see it is that media is seen as a disposable asset by many people; something to just waste money on regardless of the low quality and unoriginality. Vehicle purchases are quite different: most people want to get value for money and have a vehicle that will last them years.
Part of me - the slightly sinister part - secretly hopes the economy will worsen more and the general populace will be forced to tighten their belts even more. With luck, it would be enough to seriously disable these media cartels. However, even then I doubt it would work. More people would just clue onto downloading tracks and the RIAA would go back to their old method of suing every last one of them. Other people would continue to purchase their shiny CDs even in the face of bankruptcy (the world has no shortage of idiots).