These are really bad examples! Actually you listed 3 things with no underlying value. A more proper example would be a knife, it is a very useful tool and can

These are really bad examples! Actually you listed 3 things with no underlying value. A more proper example would be a knife, it is a very useful tool and can also be abused. Honestly I would rather live with the risk than in a world without knives. But to each his own.