 So wrote Justice Ruth Bader Ginsburg last week in an opinion upholding a federal law that bars convicted domestic violence abusers from possessing firearms. Seven justices, including conservatives Clarence Thomas and Samuel A. Alito Jr., joined the opinion. This is the same Supreme Court that held last year that the Second Amendment protects an individual right to bear arms. If the justices can bless such a law, one wonders why Maryland lawmakers cannot follow suit and embrace an equally sensible measure.