Shawn Is it really possible, any one close other people account to get invalid clicks and google ban your account.? I think, may be small adsense account owner get into this problem .
You can prevent showing ads with your publisher code in other sites. Also, if you report invalid clicks to Adsense, they cancel these clicks. Google cares about publishers uch DP
As doronty said... specify the allowed sites for your ads, in Adsense Setup -> Allowed sites. Also forward such mails to Adsense Team (including all mail headers) and don't delete them from your mailbox. In case something happens, you will have evidence that you were a victim of flooding/spamming/invalid clicks or whatever.
that is considered extortion. I hope he is only kidding because he is considered a criminal right now.
that's pretty funny. Not as funny as this person who tried to extort money out of a group of hackers that were running a privately funded server of EQ back in the day. They hacked her life to bits! -Scottydont