First of all the kid needs to quit being such a whining bitch about his life and his imaginary girl friend (probably had such a self-esteem issue that he probably didnt even imagine a hot one). People get guns in south korea if they can't im sure their neighbor to the north would gladly supply them guns to shoot at someone in south korea. If you want something and you have the money you can get it in the world someway somewhere somehow. If you really want to stop all violence in the world, set-up these rules:

No body can wear clothes or grow long hair because they could choke people with it

no ones allowed to work because the stress might make their emotionally fragile ass freak out

no driving (you could hit a squirrel)

no use of any household chemicals because they could be made into weapons

no drugs because the minority of people who use them give them a bad image

everyone must become the same color because looking different might offend some people

everyone must have their arms and legs cut off so they cant hurt each other

no use of eating utensils, we'd have to eat like pigs with our faces in our food (drowning in soup will become a leading cause of death)

everyone must be brainwashed into thinking the world is a happy place

there must be no religion because different views would provoke torso wrestling

scientists must find away to fuse all of the land in the world together because if we live on different continents we would hate each other

everybody must act exactly the same so that there is no difference between one person and another

and finally the mike tyson vs buster douglas fight must be ruled a ko for tyson

And that is the only way you'll stop violence. i'll give you a 120 year head start hopefully you convince many generations of your family to continue this effort and GO!