SAN DIEGO (Reuters) - Web search leader Google Inc. said on Wednesday it had agreed to pay up to $90 million to settle a class action lawsuit over advertising fraud by outside parties on its site, in a bid to put the controversy behind it.The settlement stems from a lawsuit filed by Lane's Gifts earlier this year in an Arkansas state court and is designed to settle all outstanding claims against Google for fraud committed using its pay-per-click ad system back to 2002, it said
[edited by: mona at 12:58 pm (utc) on Mar. 9, 2006]
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That being said, most click-bots either hijack users computers to send clicks from their PC's while they're ignorantly typing away doing something else, or grab proxies and imitate human users by any number of different means (including viewing .js and such).
It's just not rocket science.