Currently, there is click fraud detection within ST, just need to go to the LOGS > Click Fraud, if you can't find "Click Fraud" you have to install that within Admin Config. From there you can set your own custom settings w/ click fraud, the only sure way to detect it right now is to detect excessive clicks from an IP address in a short period of time...
QUOTE(YouBuyNow.com @ Mar 26 2006, 00:43)

I would love a feature that would track and report click fraud from the PPC Engines. SOmething that would collect the data, report on suspcious activity and provide a report that can be emailed to Google or Overture to get credit for fraudulent clicks.