Well the whole crime argument is pointless. I am sure most of you know of Kennesaw, Georgia. Kennesaw is 20 miles or so from my house They have a mandatory gun ownership law.
“ARTICLE I. IN GENERAL
Sec. 34-1. Heads of households to maintain firearms.
(a) In order to provide for the emergency management of the city, and further in order to provide for and protect the safety, security and general welfare of the city and its inhabitants, every head of household residing in the city limits is required to maintain a firearm, together with ammunition therefor.
(b) Exempt from the effect of this section are those heads of households who suffer a physical or mental disability which would prohibit them from using such a firearm. Further exempt from the effect of this section are those heads of households who are paupers or who conscientiously oppose maintaining firearms as a result of beliefs or religious doctrine, or persons convicted of a felony.
(Code 1986, § 4-3-10)
Sec. 34-2. Use of firearms.
No person shall fire a gun, pistol or other firearm in the city, except in the defense of person or property, and except peace officers or military forces of this state or the United States, in the discharge of official duties.”
Needless to say their crime rate went down once the law went into effect and remains ridiculously low now. Search in Google, Yahoo or what ever engine you prefer the stats speak for them self.