RIAA Lawsuits a Failure?

Pop Matters lead me to this Wired article examining the RIAA's attempted crackdown on file-sharing:

But despite the crackdown, billions of copies of copyrighted songs are now changing hands each year on file sharing services. All the while, some of the most fundamental legal questions surrounding the legality of file sharing have gone unanswered. Even the future of the RIAA's only jury trial victory -- against Minnesota mother Jammie Thomas -- is in doubt. Some are wondering if the campaign has shaped up as an utter failure.