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There ARE a few "bad apples" out there, sheltered by their supposed skills.
Particularly in privately held older shops with older owners and no external oversight, surrounded by an archeologically-layered array of legacy systems, the IT geek has no serious limitations or social restraints -- because s/he is almost totally insulated from the typical "consequences" of being anti-social, snide, sarcastic, and generally insulting. Which becomes a recipe for disaster when the person in question HAS no formal IT training, but has simply absorbed bits and pieces over time. Because THAT is when anyone who DOES have a clue becomes a dire threat to their precarious stability.