I found this hilarious in that article

The Brady Campaign to Prevent Gun Violence - which supports gun control - said the decision would "most likely embolden criminal defendants, and ideological extremists, to file new legal attacks on existing gun laws".
rofl.. as if these group of people are going out and buying legal guns. Even if this ban were in place they would get guns and use them. Banning doesn't change a thing, just look at prohibition in the United States.