Background checks are meaningless as long as healthcare providers are barred from warning police and family members about mental health issues. HIPAA restricts mental health reporting to much. Go back and look at all these mass shootings. 2/3 of the shooters have serious mental health issues. Most were known but you cant violate a HIPAA without running serious legal risks. Easier to not report. So all the red flags get ignored. No gun laws can be effective when you seal major information like this. Gun laws only stop law abiding people from breaking the law. Those who choose to break the law ignore them. And what is a minor jail sentence to someone willing to commit a mass shooting or rob a bank? Not even a consideration.