Should carrying a firearm while intoxicated be legally allowed?

When you are drunk or drinking, you have a diminished capacity. I am not for more laws because they do little to dissuade those who do not have common sense who will do those things anyways; look at all the people who still have cell phones glued to their faces while driving. In any case, if a firearm is used and the shooting is unjustified, the person will already be punished for it whether drunk or sober.