For an experiment, I once left my loaded semi-auto shotgun out on the front porch in my rocking chair for a whole month.  In plain sight.  Hundreds of people walked and drove by my house during that month and not once did my shotgun so much as even aim at someone let alone shoot at someone.

Take guns away and motor vehicles will become the weapon of choice for those who are hell bent on mass killings.  I own guns for the same reason as law enforcement does..... self protection.