Pizza delivery guys have a far more dangerous job than police. Drive to a location chosen by a stranger who knows you will show up with cash, food, and a car which you will willingly exit. And all in 30 minutes or less. And they deal with the same types of obnoxious people as police, who you think deserve automatic respect for it.
Pizza? Give me a break. The police have to show up, every time, when there is a call for help. There's a risk there every time, not a statistical risk, not a worry that someday somebody will rob you. There's a robber or an abuser or a drunk at the address Every Single Time if you're a cop.
Policing doesn't crack the top 10 BLS list of most dangerous jobs. http://www.forbes.com/sites/jacquelynsmith/2013/08/22/americ...