It hasn't happened to me but if they got the information through hacking a Merchants system I would be if they wanted me to pay for someone else's security shortcoming. I would fight any charge that they wanted to impose on me.
my brother just had his credit card # stolen somehow. suspicions rose after charges started coming up in russia, japan, and the uk. the cred card company called him before he knew nething about it. only about 400$ though.... god damn digital criminals