Re: IT guy gets fired and goes rogue.
One issue is how big is the IT staff and their respective responsibilities. In a small to medium non-IT organizations there may be only 1 or 2 true sysadmins on the payroll. I have worked for companies small enough the onsite IT department was the most computer literate employee; usually someone who had a vague idea how a network worked and how install and maintain the anti-virus. Anything real serious would require bringing in an outside contractor.