I live in Denver, cap hill area half a block off Colfax. I've also lived in Philly for a couple years. I have never needed a firearm for protection. I have been in all parts of Denver at all hours of the night and never once had an issue I couldn't handle. I have never locked the doors when I'm home in my entire life (A habit from growing up in Iowa)and have never had a home invasion. The only time I have ever called cops were for wellness checks on some of the homeless people in my neighborhood. Cities aren't as scary as the media tends to make them out to be. 
 
The people that live in the most violent parts of violent cites are not calling for more guns, they are calling for more strict gun control measures. They don't see arming themselves as a solution against the violence because the gangs have the numbers. They want to take the guns from the gangs and they believe that the way to do so is to have less guns in circulation.