purplecape - 4:00 am on Apr 26, 2008 (gmt 0)

I'm not sure that it's worth getting that outraged about.

First of all, if you know the rate of click "fraud"--and I would really like to know how they define that!--then you must have an idea of which clicks are "fraudulent." And that should mean you can just kick them out of the system. The advertisers don't get charged for them, and everyone's happy.

Even if you can't pinpoint them, you can make adjustments, through mechanisms like smart pricing.