I found a thread at DigitalPoint Forums a bit shocking. The member said, "I am going away for a week trip and I want to take my ads off the website on july 20th, when I leave, in case of a click attack when i am not here."
Google AdSense publishers are afraid to leave their computers, afraid to go away on a vacation due to competitors or just evil-doers, clicking on their ads to have them kicked out of AdSense.
I run AdSense on a few sites and I never personally worry about this.
My question is, are those who are more likely to worry about getting booted from AdSense already doing something a bit on the wrong side? Do they run MFAs? Are they clicking on their ads in a "natural way." Or does this fear reside on most AdSense publishers that notice a nice income from the contextual advertisements on their pages? I don't know.
But if you want to see what others say, and most responses are back and forth, discuss at DigitalPoint Forums.