But if you lock the screen, then no-one can see the passwords.
Admittedly we have an issue right now with the screen lock in that it doesn't come back on straight away after a reboot, but my understanding is that it'll be fixed in the next firmware release.
So without the pin code for the LCD, no-one will be able to access anything.
It's hardly a big security issue, but yes, we understand your concern, but at the same time, these things where added to the LCD UI as a means of 1. convenience 2. allowing the user to find the randomly generated passwords easily 3. making it easy to change the passwords.