Have your account ever been disabled in Google? What reason?

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Google offers more money in each click. It has higher rate. One can generate living easily using Google Adsense. But this service has to be used ethically. If the service is not used ethically, Google will disable the account. The user, whose account is disabled once, will never get any opportunity to join the google again. Have you ever earned some money from google? Have your account ever been disabled in Google? For what reason it was dissabled? What did you do then?