I accidently clicked one of my ads a while ago, I emailed google within minutes of doing it. Took about a week for the response which was basically along the lines of... 'thanks for letting us know, don't do it again - here is a copy of the TOS to reemphasise that you are not supposed to do it'. Whish of course I knew, I was just happy for my account to still be open. The moral of my story, you don't get banned for 1 accidental click.
whew.. i am so happy today.. atlast received email from google.. Google Appreciate your notifying us of the clicks that have been made on your Google ads........ They also advice me to use google viewer next time.. (i learn something new here.. ) Thanks again to all who concern..
sorry.. my mistake.. it supposed to be AdSense Preview Tool https://www.google.com/support/adsense/bin/topic.py?topic=160