So what good is a credit card number without the expiration date and security code, let alone your personal information? Or is all of this stored on the magnetic strip. And if it is all stored on the magnetic strip, then what’s the point of asking for things like your security code, expiration date, name, address, phone, etc?
Not sure if everything is on the magnetic strip, but would assume it is because your name and zip code are there for sure. I'll guess that the security/pin are not on it and are validated live when hitting an ATM. The point of asking is generally for purchases where the card sees no action - on-line, etc. I would imagine they are sophisticated enough to manufacture a fake card that actually works - gas pumps and stores where they don't ask for ID, etc (which is easily overcome). IOW - if they get the info from the strip, they can steal a good bit before being shut down.