It's not a weapon, it is a Big Ass letter opener, box trimmer and roof tile edging utensil. That some have used it as a weapon is a sad commentary on modern society, and a terrible injustice to all those poor letter openers who do packing and roof tile trimming as a part of work, who are hobbled by the banning of the tools they need to operate their trade properly.
Then again, that is a pretty boiler plate set of conduct rules, almost invariably printed on any such contract or other communications, and pretty much like any other shrink wrapped EULA. It might be part of a 30 page document, written in 3 point Flyspec font in 18% grey.
Almost universally ignored, and you probably could put Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum in there as well and it would also be accepted.