Pay Per Click Fraud - Bigger than you think

"Click fraud is simply the act of clicking on ads for the direct purpose of costing the advertiser money. It's similar to paying out cash for false leads. According to InternetWeek.com, 60% of those who responded to a survey conducted by the "Search Engine Professional Organization" had stated that fraud is a problem when it comes to PPC advertising. " Full article at webpronews.com