While going through our records recently, we found that your AdSense account has posed a significant risk to our AdWords advertisers. Since keeping your account in our publisher network may financially damage our advertisers in the future, we've decided to disable your account. no cheat,why ? anybody like that? I think may be many click, so that adsense ban ???
I don't think people ever know when they send out this message. Maybe you were advertising your site somewhere it shouldn't have been, i.e., traffic exchange?
Go for a legal case in your local court agaianst adsense and google giving as an evidence the mail that you got from them