Hi there i was using adsense for my forum www.itdunya.comi get good trafic but suddenly my account was closed and i was emailed by google saying it is being closed caz of invalid clicks?????? now i didn't do these clicks offcourse since i knew the outcome..........So does that mean you can close anyone's adsense account by just cliking on their site again and again from same IP?
Pretty much so, yes. You've spotted the major weakness! But seriously, they can spot very subtle patterns of invalid click activity and can tell the difference between the publisher clicking their own ads a few times every day and some troublemaker clicking the ads 100 times in 2 minutes. They wouldn't be banning you unless they were confident something was wrong.
Well, if you genuinely, hand on heart, can say that you didn't click your own ads or ask anyone else to maybe you were. Most people who are banned for invalid clicks, even those who profess their innocence, have actually broken the rules.
Well, the usual convention is to appeal using the e-form they provide. Failing that he could always try and start a new account with completely different details - basically using nothing at all related to his previous application. That would be against the rules and they'd ban again if they found out.