Hmmmm....Looks like someone's trying to click bomb my sites with adsense on them. what do you typically do about it???
this is good thing, if u see anything suspicious just inform the google and make the ppl doing the clickbomb pay for it
If your account shows any unusual click activity, this could be that some trying to get your account banned. You should report this to Google to be on the safer side. There is a special form to report invalid or unusual click activity at https://www.google.com/adsense/support/bin/request.py