Click fraud has been an ever lingering issue with the advertisers. Finally, Google's Click Quality team has got down to address the issue more seriously. In an elaborate post, Meet the click quality team, not only the team comes to the fore but also talks about the process of protection, such as the automated filters.
Seems like Google is working on its ad front a little more intensely. After the recent hike in ad commission rates, this seems like the next logical step to lure advertisers and also to keep them from going away. Is this the 'Panama Effect'?
The post adresses all major concerns in detail and leads to numerous sub-links which have to-the-point answers to the most persistent problems. There is also a detailed form at Google Help Center to address the issue.