EDIT: From my friend Audie....
I used to work for an ATM Manufacturer. I hear lots of stories of how people try to break into them or into your accounts. One clever case was by a couple of guys from Southern CA. All they did was simply stuck a card skimmer right next to bank ATMs & then labeled it "Card Cleaner: Swipe to clean your dirty ATM cards." You couldn't imagine how many people actually used it. They made tons of $$$!