I hope people realised that previous post was tongue-in-cheek.
I live in a fairly rural area in the UK, we have a lot of shot guns here, for peasant errrmm I mean pheasant shooting, they are not carried openly and it is very difficult to use them in a killing spree as you have to reload the cartridge after the cartridge (or 2 if double barrelled) has been discharged.
As Simon pointed out we had a few spree shootings (probably averaging out at 1 per decade) over the last few decades. Two that spring to mind were Dunblain and one quite local to me in Hungerford (a gun nut called Michael Ryan), these resulted in tighter gun control measures which have resulted in an even lower incidence of gun crime.
Bottom line - more guns do not correlate to increased personal safety.