Azrael
circling Airstrip One
Against parents parents who, through their negligence, cause their children's deaths, no, it often isn't, just as it's poorly enforced against crooked gun dealers who supply the black market, and idiots/crooks who don't report their gun stolen (mandatory in only a handful of states). The unacceptably high incarceration rate caused by inflexible mandatory minimums and the "war on drugs" doesn't make laws uniformly enforced.The USA locks up more than 2 million people at any one time. It certainly has the most brutal sentencing and penitentiary system in the western world. And yet... law isn't 'enforced'. That's another of the law-and-order fantasies.
Go on most any gun rights blog or forum, and you'll see equal frustration that existing gun laws aren't being enforced. Former AG Eric Holder was held in civil and criminal contempt of Congress for refusing to turn over documents relating to "Fast and Furious," a botched gun-sting that saw illegal weapons end up in the hands of cartels.