Here’s what Ted wanted. He already has an XM Radio subscription, and he wanted to buy a replacement radio. His was broken, but Best Buy carries them, and Best Buy stores are everywhere. It couldn’t be that bad, could it? Just stop in, exchange money for radio, leave, walk out. Not so fast, there, Ted: Best Buy needs your name, address, and phone number before they can sell you a radio. And they have no idea why.