The last thing we need is Armed Forces on the street. Things aren't even that bad overall.
Are you really fearful of your life/property? If so, turn off the news and go out for some fresh air.
Ironically, having the national armed forces out in the streets is not a warranty of security either, you know. Here in my country, we have our national military basically roaming around and looking over outposts and still criminality is high. The military was created to protect the integrity of the nation, not to take care of common criminals, both are completely different things.
By the way, I like how you point out much TV and watching too many hours of news could negatively affect the perception one has over one's country and the situation it is going through. And I agree with it, there are people who are more easily carried away by what they see on News and can even get anxious because of it.
Whatever the case, and regardless the news are exaggerated or not, one knows the criminality of a country is under control when one does not need to check each time the surroundings before taking out the phone and stuff like that.