I believe the scam you're speaking of is an urban legend even though the news media (biggest spreader of urban legends) is reporting about it. From experience, credit card companies require a lot of identifying information, above and beyond a simple "yes," to approve a suspicious charge/purchase. I doubt much, if anything, can be accomplished with the simple statement you responded with. I wouldn't worry about it.
I believe the scam you're speaking of is an urban legend even though the news media (biggest spreader of urban legends) is reporting about it. From experience, credit card companies require a lot of identifying information, above and beyond a simple "yes," to approve a suspicious charge/purchase. I doubt much, if anything, can be accomplished with the simple statement you responded with. I wouldn't worry about it.