Bug#433427: Serious privacy bug

[Wade Richards]

I want to reinforce the idea that this is a serious security/privacy
problem.  I selected the "Random" screensaver option because I expected
a collection of interesting and amusing screensavers.  Weeks later,
I was shocked to see my personal photos displayed on the screensaver.
If they had been "NSFW" photos, it could have created a serious problem.

I consider this more than a "wishlist" bug, as it can lead to unintended 
information disclosure.

The simple fix is to remove the slideshow screensaver (either entirely 
or from the random screensaver).  A better fix would be to have an 
"include screensavers that show local information" option in "Random".