Or it could have been a feature. Back in 2000, I worked on the ecommerce site of a major consumer electronics manufacturer. One of the "features" that was imp

Or it could have been a feature. Back in 2000, I worked on the ecommerce site of a major consumer electronics manufacturer. One of the "features" that was implemented was for people that had an account, but hadn't logged in and had decided to proceed through the normal checkout process. When you entered your email address, it did a lookup at the accounts database and if that email address already existed, it logged you in as that user. Credit Card numbers weren't viewable, but were stored on the account. Nobody understood why this was a bad idea until I ordered a digital camera to the head of internet marketing using his own account.