I work in a nursing facility and can’t even carry a one inch pocket knife. I might go crazy and kill somebody don’tchyeah know? I’m glad there are some businesses that are smart.
Meanwhile they have medication that can be used to OD someone, miles of cable/cords/tubes to strangle with, I'm certain heavy items to bash with. Yeah, I deal with it, too. When told we couldn't have knives over 2" or serrated blades, I asked about sharp pencils. Yes, they gave me that, "what do you mean?" look.
I mentioned that I could create mayhem, general havoc, and even cause severe injury and death with about 10 different things on my desk, most of which were required for me to do my job.