I consider my email to be like a personal folder, where I have an expectation of privacy. If I accidentally left my briefcase at your office, I would hope you w

I consider my email to be like a personal folder, where I have an expectation of privacy. If I accidentally left my briefcase at your office, I would hope you wouldn't look through it. If you found the keys to a room full of filing cabinets with other people's papers, it wouldn't be right to go open them all. Similarly, if you find a list of credentials that grant you access to the electronic documents of others, it's not right to use those credentials. Of course 'downloading a car' is a terrible metaphor, but comparing electronic documents to printed documents seems very straightforward.