Yahoo is taking click fraud on its network more seriously (or something like that) as indicated by this news:

Yahoo has promoted one of its staff attorneys to an executive-level position that is akin to being click fraud czar at the second largest Web search provider.
For seven years, Reggie Davis helped the Web search company defend itself against lawsuits by advertisers who claimed they were overcharged for pay-per-click ads that resulted from click fraud. Click fraud occurs when clicks are generated by people paid to click ads over and over or by automated software programs, usually for the purpose of boosting revenue for the Web site the ads appear on.


Full story here: Yahoo names click fraud czar | Tech News on ZDNet