Thanks for all answers!
Leaving the phone in the car is not really an option. I would like to use the Hero as phone and as PDA (calendar, taking notes). I need it mainly in the office during the business times.
The security department prefers mobile phones that were originally built without a camera. As it becomes more and more difficult to buy mobile phones without cameras, they are thinking about possible solutions. But so far no decision has been made.
I think they would accept a Hero, where the hardware camera module, the lens and the camera software have been removed. Ideally the back cover shouldn't have a hole anymore. Whatever has been done to remove the camera function, it must be obvious to the security person.
Does anybody know whether the lens is attached to the back cover or to the camera module? Has anybody seen a third party back cover without lens/hole?