At the risk of being called a complete retard by users around the globe, I would like to propose that Kazaa actually helps stop piracy.
Why do people risk life and limb boot-legging films or ripping movies, songs or DVDs?
The majority do so to make some money on the black market.
There are also millions and millions of "pirate" videos and music that people are risking a fine or jail buying them so they can pay less for it than had they brought it in the shop.
Why would people undergo such a risk when they can simply download the pirated files from kazaa?
So once upon a time the piracy industry was an industry in the billions, but gradually, thanks to programs like kazaa, there is less money to be made.
And if there is less money to be made, then the cost of being an underground pirate suddenly isn't worth the risk.
Kazaa is a means of people trading files freely amongst other users. If they are pirated videos traded, then the crime has already been done before they reach kazaa.
O.K, you can call me a retard now.