chmod 0000 `which sudo`
Then you just enter a root shell with "su -" and (gasp) type root's password when you need to do something, and the pretty # is there to remind you that the safety's off.
(P.S. to be honest, I "sudo -i" all the time like a proper hypocrite, but then I'm not using any Apple nonsense. I might have a copy of OS9 but that particular iMac doesn't turn on)