I've noticed a lot of scam sites which sell kazaa lite (and various other programs) advertise using google ads. From what I understand when someone clicks on a google ad, it costs that company money.
What If someone made a program which automatically loaded the URL's of these ads in the background? Thousands of P2P people may "accidentally" download it onto their system "unaware" of what it is. These companies would lose a lot of money and when google finds out that their clicks are being inflated the sites will be removed from the google index.
When I say google ads, I don't mean the ones on pages like this forum. That would get this site into trouble. I mean the ones you see on google when you search for kazaa. That way the evil scam company pays without harming any webmasters who have google ads on their site.
This is merely a thought. I neither approve of this idea or condemn it (if you know what I mean).