My company has a no weapons policy also, but the ongoing joke at work is that I carry and noone cares. The other day a manager was joking about going after an employee so he asked a coworker for a knife. The "victim" said something else and he said "that's it, (dblagent) give me a gun!" I propped my leg up on a stool and started lifting my pant leg and everyone about fell over. Noone actually looked, I said I don't actually have one, and they said, oh, we just assumed you did.
I did not know that they were that easy, they just say they do not want to know. Allllrighty then.