Guerrilla Printers
My boss (BOFH) and I (PFY) had a user that refused to use the network printer, but insisted in this local attached HP Laserjet.
An evening expedition to his office, a bit of insulation tape over the laser unit and we managed to neatly remove exactly one column from his spreadsheet.
The "broken" printer was removed to be "repaired" and he never saw it again....
In another office I had to turn down installing new more cost effective printers because the blue on the old ones were nicer than the correctly colour calibrated new ones.
Biting the hand that feeds IT
