Bypass screensaver/locker program on xorg 1.11 and up

It's so surprise for me when I found this post. If you want to see full message, please go to the Source.

Hi,
I recently stumbled upon a funny bug feature in the Xorg server that
could allow attackers with physical access to a machine to bypass the
screensaver/screen locker program.
Most people use those programs to lock their computer when they are
away. On Gnome, gnome-screensaver is