accountability

What would happen if people were held accountable for their actions? If the laws were written such that the person was responsible for their actions regardless of whether they were drunk or did not know that the gun was loaded. In turn there would be no lower age limit to drive, drugs (including over the counter, prescription, alcohol, and illegal) would not be regulated, guns would not require registration, and so on. But if someone died as a result YOU would be held accountable, not the gun or drug, you would be charged with murder, not manslaughter or accidental motor vehicle homicide, but MURDER, and you would receive a life punishment such as life in prison? Do you think that murder rates would drop?