To me, it's a bit academic. I have never posted my mobile number but that doesn't stop the usual calls about my recent Amazon Purches totalling several Thousands of Dollars and please press 1 if I didn't authorise this purchase. I have never had an Amazon account, not sure anyone in Oz has ever had an Amazon account ever. As far as I know, Amazon doesn't have much of a presence in Oz. Not sure who is worse, Amazon or the Phone Arseholes, Thieving Cunts.