You don't have to like it, but you're on your employers quarter you dance to his rules. When you win the lotto or start your own company you can carry whatever you want. It's tough enough to find a job in a down economy, but it's even tougher when you've been fired from your last job for violating company rules. You will end up flipping burgers.
With knife nuts making up less than 1% of society at large, get used to the fact that the rest of the herd does not look at knives the same way we do. These rules have come about because some moron abused his right, and ruined it for many. I used to be a machinist before I retired. We had some young idiot cut off his right index finger by abusing a Buck 110 on the job. He was confident in the lock on the blade in spite of the older guys telling him to knock it off. Within a week, Human Resourses came down with a no knives policy. We could only used the stock box cutter from the supply room afterward.
Keep flashing those waved folders in public, and we'll be like England yet. An idiot few ruining it for the many.
Carl.