Hi – I know that we are not allowed to click ads on our website and we are fully bound with all Google adsense policies. However we are afraid for what if a jealous person hits repeatedly on ads on our website to get our account blocked. I slightly remember that there is a way to restrict repeated clicks on ads but not sure how do we do that. Or is there any other way to protect our ads from invalid clicks by somebody jealous?

Thanks in advance for your help.