My friendly Subway minion also informed me that they may ask for ID to ensure that the info I enter on the card truely matches my actual identity. I hope Mr. I P Freely, 123 Main St doesn't mind me borrowing his particulars while I chow down on my steak and cheese on hearty italian.
Personally, I *like* the fact that RadioShack, FutureShop, et. al. take my name and address and track all my purchases. It makes it that much easier