In Singapore, no one is allowed to have gun - only the authority (police etc) can have. Thus, there is no need to be afraid that someone would came into your house and start shooting. You say the police? Well.. Singapore wain the top ten least corruption list 2014..
So, I think other country should implant the same law Singapore have. No one should be allowed to have gun.
There are some situation differences between Singapore and other countries. You could said that because you are living in peaceful area, and I think Singapore is the best place. But, what would you do if you are living in full of crime place, which there are evil guys around your house. You need a tool that can secure your family and home from them.