I don't agree. If a law is utterly ineffective (and wow, these sure are ineffective!) they should one and all be repealed. I like Rick Scott's idea about sunsetting stupid, dumb laws that don't work.Or explain how some of these nut jobs got guns. One recent shooter did some crazy shit and the cops never charged him for threatening to kill his mom. So a few years later he purchased a gun. That incident should have stopped him from being allowed to have a gun.
That wouldn't stop all shootings but maybe it would have stopped him. Sure, he might be able to find a gun on the black market but that doesn't mean we should let him have a gun. Because he's going to get his hands on one anyways. That's a dumb reason to not have background checks.