netmeg - 7:34 pm on Mar 20, 2013 (gmt 0)
Well in the first place, they don't take any customer information unless the customer opts in (and even then it's just the email address and country) Everything else is specific to the order, the products, the quoted shipping date and the merchant.
The shipping and return feeds are also anonymous as far as the customers, and don't include any address information. Just the order number, the shipping company and the date. They take this to make sure you ship when you say you ship.