Panel locking on Gnome

This one liners will lock (and un-lock) the Gnome Panel, preventing any changes on it.

Ideal to use this after you have spent all that time configuring those Panels just the right way.
To lock it up

gconftool-2 --type bool --set /apps/panel/global/locked_down true

To un lock it

gconftool-2 --type bool --set /apps/panel/global/locked_down false