We already have those in CA and i don't think they have made us safer. Most criminals don't care if they got caught without having went through a background check. When they finally get caught doing something they always have more to worry about then a charge like that.
That is funny to me though. Typical Dem stir people up like you are doing something big, then just pass a background check and tell people they are safer now. maybe create an agency that is tasked with background checks so you can hire a few more govt workers. In the end that is all this govt intrusion into our lives does. Create more jobs for the machine.