I know Phil. The pettiness of our workmates is disappointing. Likely a bike hater.. Is the environment outside all that hostile to bikes. Crime wise, etc.. A couple locks can secure all your bikes' components.. Plus maybe a drop cloth that folds. I can understand though. I have to know my bike is secure when its out of sight..
Are you sure your management has made this an open shut case.. No further discussions are to be tolerated. ? Maybe other remedies are possible. I kept my bike locked up in the basement of my work place , where no one frequents. No one objected. I suspect large Calif employers welcome bike commuters for one reason.. Calif air control laws encourage alternative transportation.. Bike commuters gave my employer some kind of credit with state air monitoring agencies. I know they kept records of those who did not drive to work for what ever purposes. The most common being those who car pooled to work.