I have several items on my desk that can be used as weapons. USB cable garrotes, stapler (red, of course) bludgeons, pens and pencils to stab with. A telephone bludgeon. A laptop bludgeon. Metal bits from my cubicle that are five feet long and removable with skinny sides could be used like a blade. A weapon is something you use. It doesn't have to be traditional.
A friggin’ rock or a brick. Gotta outlaw them too.