You know, somebody used a similar argument to me with drugs. (that drugs should be legal) Don't worry I agree with you Jeku (well to a certain degree)
It'd be good not to need such self defence - still have a hunting weapon, people hunt with guns in the UK, there's a gun crime problem (but they haven't bought their guns in the shop, they've got them illegally, though it'd be funny have a chav mugs someone with an Air Rifle) - but cases are seemily rare of people being killed, though it seems to be more between gangs than innocent bystanders. Guncrime will always be there, drugs will always be there, paedophiles will always be there - it's all illegal.
It'd be great for America not to need their guns for protection and any other countries with a similar situation.
However, I sure these are all 'decent' ideals, and of course what idealism is always great, because that's the point of it - however not necessarily realistic or practical - I think the gun problem is one America will solve for themselves (or not) and we all really should be worrying about our own countries' problems (or ignoring them, depends on your level of apathy).
I'm sure America's gun crime isn't going to solve any problems here, unless we can find a real Texan psycho-shooter stereotype to threaten the right people.
"Experience never provides its judgments with true or strict universality; but only (through induction) with assumed and comparative universality." - Immanuel Kant