Actually you misunderstood me. I said, that single documents should be password protected again, so that the mobile client can stay open as most users like it. I am not sure if you ever worked with password protected documents in Office, but while your computer might have a password and you can leave it unlocked all day long, just to open this one document, you need an extra password again. So just password protect a Notebook, so you need to enter maybe a different password than your Evernote password just to open the notebook. This way most people have what they want, as they just want that people can't open single notebooks from evernote, while all the other ones are an open book to everyone that comes along the computer.