Joel Spolsky offered the one and only sensible way to fight back that will actually work: go on the offensive and get legislation introduced to roll back the extensions of copyright & other IP laws.
For example: "Roll back length of copyright protection to the minimum necessary "to promote the useful arts." Maybe 10 years?"
Not only should these laws be rolled back anyway IMO, but by merely pushing for these you'll drain the resources of the RIAA&co so their offensive campaign stops.
(https://plus.google.com/117114202722218150209/posts/4GgaRiSy...)