Originally Posted by Slappin Fish

There use to be a program that filtered invalid clicks, wouldn't show ads if someone clicked more than a set number of times... I think it isn't supported anymore though.

I had a site that got slammed by a competitor. Google got in touch they were helpful, never threatened to closed the account, at worst if I couldn't sort it out they would disable ads on that particular site not close the account...I wouldn't worry too much.