Wow, you've made a lot of assumptions about me and not very charitable ones. Let me address a few of them:
1. I'm not a TV watcher. The last movie I saw was "Frozen", and before that I can't remember. I'm certainly not motivated to live-out some TV action-hero fantasy. Moreover, your comment has a strong expectation that egocentrism undergirds one's actions. My obligation as a father is think of my family before myself. If you're a parent, I hope share this ethos; if not, I hope you develop it before having children.
2. Even if I were motivated by TV, I'm not sure which action film you're referring to. I missed the one where the dad is leaving the store with the wife and kids, pushing a shopping cart full of groceries, is accosted by "violent criminals out for blood", shoots and possibly kills the criminals in front of the children, then makes their epic retreat to safety in the minivan, with the wife on talking to the 911 operator in between sobs and episodes of panic-induced vomiting. No doubt this happy tale ends with permanent hearing damage for all involved, years of court appearances, legal fees, and a possible prison sentence, and the kids in therapy after witnessing human bloodshed by the time their 4th birthday rolls around. Doesn't sound like a movie I'd like to see.
3. I'm not sure why you've assumed that violent criminals don't exist, or exist to such a limited degree that their presence should be referenced mockingly. In the United States in 2014, "[t]here were an estimated 1,165,383 violent crimes (murder and non-negligent homicides, rapes, robberies, and aggravated assaults) reported by law enforcement." [1] Surely this ought to at least make one pause to consider how to protect one's family.
4. I also don't understand why you think the presence of witnesses or general availability of law enforcement is indefeasible deterrent to violent crime, especially in light of the recent events in Orlando. [2] Finally, the Supreme Court has even ruled that police, et al., are not obligated to protect you. [3] Even if the police appeared on the scene the very moment a crime were committed, they would still be reacting to violent crime that has already occurred, and have no legal duty to intervene.
Source:
1. https://www.fbi.gov/news/stories/2015/september/latest-crime...
2. http://www.cnn.com/2016/06/12/us/orlando-nightclub-shooting/
3. http://www.nytimes.com/2005/06/28/politics/justices-rule-pol...