Like others have said, one accidental click shouldn't cause you any problems. Google understands that these things happen. Relax!
If its just one click then you dont have to worry about it you will not get banned but try to avoid such a mistakek in the future
They will not if you are from a country other than India, China as they have a strong discrimination for people from these countries.
adsense will not ban you if you click your own ad once, but if you click it more than 5 times, i guess google will ban you.
There gonna ban you and then sue you lol just kidding if you are using WP there are plugins that allow you to block ads on certain IPs It'll help
Whew alot of posts about this.. Yes and now another 1 . Anyways, ( yay topic subject change ) is it just me or is every 1 afraid of google banning? Im not talking sarcasme here, but somehow i ALWAYS feel like i can get banned every single day, even though im doing nothing wrong.. Just the creepy feeling..
Yep I have done it before by mistake, its nothing to worry about. From google: Accidental Click - Don't Panic!