news.yahoo.com/s/ap/20060507/a ...

Yes, interesting story. Click Fraud will be something that all "ad" players need to contend with, thats the risk of the systems.

"You make the world idiot proof, the world makes a better idiot"

In short, whatever methods are being used, the crooks will find ways to beat the system!! It will take a long time before the markets, OnlineAd providers, Legal statutes and consumer trends all merge together to make a cohesive pattern which negates "fraud" in general.