While it's true some places are statistically safer than others, things like this can happen anywhere. From the pictures I've seen of this incident, it appears to have occurred in a fairly upscale neighborhood. I live in what most would consider a nice/safe neighborhood, but that didn't stop a gang member from trying to pry open a window on my house in broad daylight.

Micro guns in small calibers are generally considered compromises, but it's better to be consistently armed than not.

Talisman or tool? : The Tactical Wire

I came across this article from Michael Janich awhile back and found it interesting since I am fond of and have carried neck knives on many occasions. I've not explored the carry of a small gun in this manner all too much, but it's something you might look into.

Neck Chain Holster: Stellar Rigs' Travel-Friendly Carry Design