Joseph Sullivan, eBay's Director of Law Enforcement and Compliance, lectures to a crowded audience representing numerous law-enforcement agencies:
"We don't make you show a subpoena, except in exceptional cases. When someone uses our site and clicks on the `I Agree' button, it is as if he agrees to let us submit all of his data to the legal authorities. Which means that if you are a law-enforcement officer, all you have to do is send us a fax with a request for information, and ask about the person behind the seller's identity number, and we will provide you with his name, address, sales history and other details - all without having to produce a court order."
... oh, and they also own PayPal, so they know what you're spending your money on, too. Somehow, I don't think I'm going to buy anything through eBay again anytime soon.