Any sysadmin going the route of 'job security' through obscurity(i.e., no automation or documentation) should be classified as criminally negligent.

My speciality is disaster planning and recovery. I consider myself being hit by a bus a potential disaster. That freak occurrence should not mean the end of a business.

And don't know those helpdesk types who have never touched a CLI. They allow me to bill a fortune when I step in to fix their botched deployments.