Er... didn't work.
The trouble at Sony may be worth bringing up the next time your managers question the IT security team's budget. Saving pennies will make firms look very, very silly when the bill comes in after a comprehensive ransacking of systems by black hats.
Tried that approach after the Target hack.. answer back: "They're retail. We have nothing in common with them.". The "nothing in common" thinking is the hard part to work around. That and management looking at the bottom line and bonuses.