A WebmasterWorld thread tells a story of a Google AdSense publisher who used his "60 internet kiosks and cafes around Las Vegas," as a means of generating some more side cash for those kiosks.
What he did was default the kiosks to a page which had AdSense on it and a Google search feature, powered by AdSense for Search.
Technically, doing that is just fine. But I suspect the suspicious high volume of clicks from the same IP blocks, over time, raised a red flag.
He explained he made about $10 to $20 per day, mostly from the search side. He said, "People from the kiosk did about 150 searches per day and check out my Vegas website." He emailed Google early telling them about his situation, which they cleared. But then soon after, he found himself banned from AdSense.
He is obviously frustrated.
Google is suppossed to be this great green company. I've done business with many people over the years. Nobody has ever treated me this bad and ripped me off like this before.
Forum discussion at WebmasterWorld.