[Alug] Secure Firewalling, Runlevel 0 (?!)

Here is an interesting article of running firewalls with the machine "halted" (runlevel 0) for extra security <*tilt*> is a first reaction. But it _is_ an intriguing concept... Article here: http://www.samag.com/print/documentID=20294 Slashdot thread here: http://slashdot.org/articles/02/02/08/1624217.shtml?tid=172 Anyone have any personal experiences of such trickery to relate? --James