We have been hit a couple times. The last one was after I placed an order online with Walmart. Someone used out debit card at Match.com and then tried to use it at Hotels.com. The Match.com went through because it was a small amount, $35 but the Hotels.com didn't because it was $1500 and didn't fit our spending patterns. Thankfully the credit union caught it and called us. We were reimbursed for the $35 and the 2 $1.00 that did go through on Hotels.com.
Our Discover card was also hit but it didn't have any credit available since we keep it small. I didn't even know it had happened until we got new cards yesterday.