Suppose someone did not click his own add .. but some malicious people clicked on the ads many times with the intention of making that person lose his adsense account , Then what will Adsense do?
Google would probably initially discount those click and warn you. It is up to you to provide proof and explanantion. In future, they will ban clicks coming from that IP.
I know many big web sites faced this problem with lot of their money locked in google adsense account. But if you contact the Google support team they will guide you what to do the re-activate your account. But this takes long time. If they are not ready to re-activate your account, I think you can make an another account or you may go for another CPC programs like Overture, adbrite, Text-link-adds, Valueclick formerly Fastclick, Tribalfusion etc., There are good ones many good traffic websites using for their revenue. But Changing from one to another needs a lot of time to update the code on all the pages. But this is part of our job.
hmmm thatz strange after all success stories adsense do have some serious problems ......... it means i can be a cause for any one to loose his account.....inney?