Well, when my local department store or Satellite TV service provides me with the ability to purchase japanese music legally, than I won't have a need for KaZaA.
I'm rather proud to be one of them "music" piraters you speak of. First off, if I like the artist, I always buy their CD. However, if there is just one song I like and I cannot find the CD Single in stores, than I'll just download it. Sure, there's iTunes, but they don't carry everything. They just cover the main crap everyone wants.
Bottom line, it's rediculous searching dozens of stores for one song when you can get it in ten minutes through illegal activity. Also, its rediculous that they expect you to use a service that doesn't carry every song you want not to mention stores that only carry specific music and only few copies of it.
Then you have those people that say "Well if you wait, iTunes will have it all." Well, when they have it all, then I'll quit.
Until then, the music industry will continue to lose money they deserve to lose due to their poor marketing.