The "FuckedGoogle" blog brings up a good question: how do you prove whether a company like Google is identifying and accounting for fraudulent clicks honestly?
This is important because, as that blog pointed out many times, Google has a conflict of interest in being transparent and solving this problem, as it benefits from the fraud.
The post brings up two possible scenarios: an insider releases some damning evidence or a click fraud artist reveals himself and demonstrates how to circumvent any protection that might be in place.
The problem is that the second scenario is unlikely: click fraud scammers want to keep their activities secret.
How to break this secrecy? Here's a provocative approach.
It only requires 1 million dollars of investement ;-)
You would build a contest: "1 million dollars to whomever can provide unrefutable proof of clickfraud of a certain amount over a certain period of time".
Then you use that proof in a class action lawsuit against Google where you make your million back and more...
A variant of this would be for the DOJ and the de-frauded parties to make a deal with a click frauder, insuring that he would not be pursued and that he can get a portition of any settlement money from the class action lawsuit supported by the evidence he provided.
If the deal takes place because the click frauder was himself sued for click fraud, then the deal wouldn't need to include any financial compensation, only the "get out of jail free" incentive.
Update (2006/07/16): FuckedGoogle now returns a 404. Not sure what's going on.