Today Google announced a change in the Adsense policy regarding the clickable areas in AdSense text ad formats to embank accidental clicks and to ensure a positive user experience. Of course this may cause fluctuations in publishers AdSense revenue.
 
In the past the whole Adsense block was a clickable area. Adsense has changed changed this and made only the ad title and URL clickable.

On the Google AdSense blog one can read: "Finally, this change won't just improve user experience on your site; it benefits advertisers as well. We currently monitor clicks on Google ads for accidental clicks, and the format change complements our monitoring system by further ensuring advertisers only pay for meaningful clicks. By reducing accidental clicks, we hope to increase advertiser campaign value and satisfaction, encouraging additional spend and facilitating higher monetization for all publishers."
 
I think is is a good step from AdSense and I am sure that this will improve the quality of clicks and therefore lower the amount of accidental clicks. AdWords advertisers will also be happy. Their Pay-Per-Click (PPC) campaigns will be more effective from now on. The only thing I do not understand is, why the changes are not valid for Google Ads on parking services like Sedo or NameDrive.