The why are you NOT in the IT dept?

If YOU are not in charge of, or working in the IT dept, what gives you the privilage to bypass/alter the security that was approved by YOUR BOSS?

To often, self proclaimed experts in the office staff think they know more then the experts that are in the IT dept, and when the viruses and trojans pop up in the network, the "EXPERT" is no where to be found (the "expert" caused the security breach by breaking the rules)