Really?   What difference in risk is there for a gun in my bedroom and a car in my driveway.    

As they sit there not one thing will happen with either one.   Nothing at all other than they both may rust if left long enough without being touched.   

You tell me what RISK does either of those objects pose untouched?

Now if someone STEALS said object both can easily be used illegally.   But in that case the person using it illegally and ONLY the person using it illegally should be prosecuted.   Unless you can prove that either object would have done anything without an outside force acting on it.