I never use a knife to unscrew or pry out fasteners. Too risky, and I have other tools. I refuse to brandish my knives because that is both hostile and idiotic. I refuse to use knives to probe live circuits ever since I melted the small driver/can opener on my SAK in a light socket I thought was off. Light show! I never lend good knives to unproven acquaintances, instead I offer to help them with their cutting needs.