I cannot imageine the senario where random people will have access to the cpu/auth/file server's consoles. It just doesn't happen if you are serious about security.
However if you want to protect your console against your friends I wrote a script to do it /n/sources/contrib/steve/rc/conslock you may also want to look at screenlock(1) Incidentially I may use this at home to protect my servers console against my 2 year old who rather likes keyboards, though this is a different type of security. -Steve
