Some dude once stole my debit card, and promptly went to K-Mart and spent 400 dollars. The bank issued me a new card, and deposited the amount stolen back into my account. I really wanted to catch the guy that did it, but even though he was on camera no one knew who he was. I remember the manager of K-mart said "Yeah, I thought it was a little weird, I've never seen someone run through a store so quickly and accumulate so much merchandise so quickly at 3 in the morning". If he thought it was weird, he should have looked at the name on the card! It's probably a safe bet that the guy's name was not Elizabeth M. Barrett.
Stupidity.
It's too easy these days, with the anonymity of the internet, and those swipe through machines at stores, where you don't even have to hand the card over. I mean, when was the last time anyone saw a cashier double check a signature.
Good luck, John Junk. You'll get through this!