Improvised weapons

In most States of the US many weapons are illegal, especially martial arts weapons. The police can arrest you for using pepper spray against an assailant, yet pepper spray is sold in places like some auto parts stores or other places. It doesn't make sense. Why is it allowed to be sold but not used ? As far as firearms go, personally I'm against their use, though they do have their place. But you don't have to spend a lot of money on buying a defensive weapon such as pepper spray or tazers. Almost any everyday common item can be utilized as an improvised weapon. Car keys can be used for stabbing and raking soft targets. Rat tail combs can be used for jabbing, and, with the teeth, raking the back of the hand or targets on the face or neck. A metal alloy five and a half inch long mini flash light can be used like a kubotan or yawara stick, plus in the dark, the light can be used to temporarily blind an assailant. A thick broken tree branch can be used for clubbing. A walking cane can be used for striking, or by using it's crook for trapping. Heavy ash trays make good projectiles, as do hefty stones. Wasp and hornet spray can be sprayed into an assailant's face and eyes, and it has a longer range than pepper spray. It can spray up to thirty feet. And pencils and Pens can be used for stabbing soft targets. These are just a few examples of common items that can be used in place of weapons should the need arise. If you had to, what could you come up with in a pinch ?