When somebody uses the "leave the window unlocked" comparison, I try to rephrase it as "imagine you have your satellite TV with thousands of channels. You browse through channels and realize that, on channel #12985 if you press the A button on your remote, the channel will broadcast you videos that were supposed to be private". This is probably a closer analogy as you are not physically trespassing, you are "committing the crime" from your couch, you are not "stealing private property" (as, the docs are still on the owner's servers) and it's mostly on the broadcaster side to transmit sensitive information on a channel that is for everyone to see.