Only if they'd also had the matching billing address and (recently in most cases) the (printed only) CV code on the back of your card. On the other hand, they wouldn't even need to scan the card... the numbers and exp. date and name(s) would be sufficient... most of which can be found on a credit card statement (except for the CV code) which many carelessly throw in the garbage!!
Short, not likely.
Again... the pin is not on your card.
The finger print theory could be viable though... but it's an easy one to blur once you know it... dial all numbers first before starting the transaction.
... J-D.
Mine is a debit card from my UK bank, there are no printed statements as it is all dealt with online - the only billing address, to which I do not receive printed statements, is in Devon, England. We don't believe we were careless, just unlucky in this instance and, as I mentioned earlier, this happened the same week in my home town in England but to far more people.