[austincheney]

If I can download your content by simply changing my user-agent identifier you don't have any security. In this context the backyard is the local computer and web browser. The lawnmower is the content in question. It is deposited and there. If you don't want the user to access your content then don't drop it into their backyard. The user isn't trespassing by accessing content left in their property.

More simple, if you don't want the user to have it then don't give it to them.