Of course any type of fraudulent charge is a serious matter and shouldn't be taken lightly, but you people are barking up the wrong tree. Apple is not responsible for any unauthorized to your credit card, and going to them to get a refund is a mistake on your part, simply because you're not well informed of how fraudulent charges are handled with your own bank.
No other business would be held responsible for unauthorized charges to your CC, so why would you think Apple is different. If someone stole your credit card and purchased a $200 meal at a nice restaurant, do you think the restaurant would be responsible? Of course not, and neither is Apple in the case where your account or CC gets hacked by some unknown individual. With that said, rest assured there are procedures in place that can help you to resolve your dispute.
You need to contact your bank and ask them to launch an investigation into the security of your account. As part of the investigation, their fraud department will contact the iTunes Store directly to investigate the claim and resolve this issue. The FTC has a special process that all merchants and banks follow related to fraudulent issues.
Unauthorized Debit Card Transactions:
http://www.ftc.gov/bcp/edu/microsites/idtheft/consumers/resolving-specific-id-th eft-problems.html#FraudulentElectronicWithdrawals
Unauthorized Credit Card Transactions:
http://www.ftc.gov/bcp/edu/microsites/idtheft/consumers/resolving-specific-id-th eft-problems.html#CreditCards
Your bank probably even gave you a disclaimer when you first signed up that stated you should contact them, and NOT THE MERCHANT, in the event of an unauthorized charge dispute. Please read the fine print and do your homework before you come here slandering a good, reputable company.
As a final note, it is not required to have a credit card to create an account. You can easily create an iTunes Store or App Store account by following the steps in this article:
Create an iTunes App Store account without a credit card
http://support.apple.com/kb/HT2534
And for those of you who might be worried about this type of thing happening to you, do yourself a favor and run virus scans, spyware scans, keylogger scans and every other type of security scan on your computer. These types of things happen because your computer got hacked, which is no fault of Apple. Additionally you can remove the credit card off your account by saving the payment method as "None". It is not required to keep a CC on an account. I personally don't have a CC on my account, as I prefer to use gift cards for this very reason.
I hope this helps! Keep it safe people !