Any ban will only stop the law abiding. Anyone with "evil intent" will find a way to bring tragedy to bear, be it automobiles, gasoline, blades, ANFO or 5 round firearms. You can legislate until the cows come home, won't change a thing except keep good people somewhat defenseless/helpless and quite possibly dead in dire moments of need.
How's that War on Drugs or Terror going again? Trading Liberty for Security seems to be a guaranteed method to end up with neither. Or so I've read... and seen. Large groups of unarmed = target rich environments for those with an agenda directed by the voices in their heads.
Remember the adage: For some, no explanation is necessary. For others, no explanation will suffice.
Agree to disagree, hope that an open minded fence sitter listening nearby will concur with your logical explanation and move on. One only has so much time alotted on this planet. Use it wisely.
A free people ought not only to be armed and disciplined, but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government." - George Washington, January 8, 1790, First State of the Union Address