Running XFCE without a panel
You may want/need to run XFCE without giving the user access to a panel; this may seem impossible at first sight, as xfce4-panel is a dependency of the xfce4 package.
This can be solved by a simple work-around; as root save the original xfce-panel file
# mv /usr/bin/xfce4-panel /usr/bin/xfce4-panel.bak
and create a new /usr/bin/xfce4-panel file that contains the two lines:
#!/bin/bash exit 1
not forgetting to chmod it to a+x
The process may need to be renewed in the future whenever xfce4-panel gets updated.