I once worked for a Fortune 500 company, Snap-on Tools, that banned pocket knives of any type in their facilities. Now, the real genius of this is that each plant had its own "tool crib" where you could go to get what you needed to do your job. In these tool cribs, available free to any employee, were the same replaceable razor utility knives that were used on 9/11. Apparently, we weren't trustworthy enough to carry a Case or Old Timer, or whatever we had paid for...but Snap-on was willing to pay for and give us the weapons used to carry out the worst attack on US soil since WWII.
Oh yes, the Snap-on catalog also carries knives and utility knives for purchase.
I no longer work there. Darn.