This phenomenon is not isolated to IT by any means. Any sort of internal support structure in corporate America has the same complaint about a lack of disrespect (facilities, HR, etc.), but those departments don't idle on message boards all day and manage to create cute online subcultures about their plight. It's human nature to have unreasonable demands of people that we perceive to "serve" us, and to have unrealistic expectations about what we don't understand. You should probably continue to focus on relations with the user community from a PR perspective. Managing expectations will prove to be more useful than user education or wallowing in your self-pity.