You just have to appreciate the irony of this paragraph in the CakePHP manual:

Now, in order to help you understand this, let’s use a practical example. Imagine, for a moment, a computer system used by a group of adventurers. The leader of the group wants to forge ahead on their quest while maintaining a healthy amount of privacy and security for the other members of the party. The AROs involved are as following:

• Gandalf
• Aragorn
• Bilbo
• Frodo
• Gollum
• Legolas
• Gimli
• Pippin
• Merry

Indeed, a practical example :P