I could see this sort of thing happening here if we did not keep anti-gun politicians in check. Plus, we do have the 2nd amendment, but there are plenty of laws on the books right now that fly in the face of it... so even with the 2A, I could still see something like this happening here if we do no keep a check on those that are anti-gun. Its pretty obvious in Mexico. When you outlaw guns, only the outlaws will have guns. And it destroys a country.