If you read the Wired article by the fellow who was hacked (
http://www.wired.com/gadgetlab/2012/08/apple-amazon-mat-hona... ), yes, Apple does this as a matter of policy, and even after Apple assured the author that this was not policy, Wired went and tested the method on two separate occasions and was able to gain access to other folks iCloud accounts.
Quote:
On Monday, Wired tried to verify the hackers’ access technique by performing it on a different account. We were successful. This means, ultimately, all you need in addition to someone’s e-mail address are those two easily acquired pieces of information: a billing address and the last four digits of a credit card on file. Here’s the story of how the hackers got them.