I have even created a landing page telling them to either proceed to correct business entry, or I offered a $5.00 reward (paypal)if they will send me an email identifying themselves and specifying a code to be found on that particular landing page that can only be reached via adwords.
Guess what no takers! But I got 35 CT.
Something is fishy...
Perhaps AWA can shed some light. I will be asking a Adwords supervisor directly though.
I am 99% sure what you are seeing is competitor click fraud.