I wonder how Google determines the identity of the person clicking on the adverts? What is to stop a publisher using a PC in a hotel lobby to log in and click on their own adverts?
Lets say you clicked on your own ads using a PC in a hotel lobby, and decided to check your gmail or login to orkut, or any other Google-provided service. That will be one possible scenario of knowing you clicked your own ads. Speculation.
Clicking on some one else's ads isn't going to get them banned, even if you click their ads a 100 times a minute.
Actually it will work (or at least it was so). I know it for sure. But Google may reinstate your account if it was not you clicking on your ads.