So basically Google has enabled trolls/people with bad intentions to destroy someone's cash flow. This seems ridiculous! That's the one thing I hate about Google...their lack of customer service. Regardless if their service is free, they are making more than enough money to set up a call center or something.
You'd think if they could identify 'suspicious' clicks, they could just ignore them: don't hold the impressions/clicks against the ad-buyer, don't reward the ad-bearing site operator. Problem solved.
If it's an honest misunderstanding: no harm done.
If it's a money-making scheme: they'll give up and go elsewhere, guaranteed.
I think all companies should encourage this. When I read this, Bell Labs comes to mind. Bell Labs had a recipe for brilliant innovation and I think all companies should take note!