In Joe Horn's now-infamous 911 call reporting the burglary of his neighbor's home last month, there's a particularly disturbing refrain that made many of us cringe. "I'm not going to let them get away with this," the Pasadena homeowner tells the dispatcher several times in various ways in the moments before he shot to death the two burglars, Miguel Antonio DeJesus, 28, and Diego Ortiz, 30. To many of us, Horn's preoccupation with stopping the crime and recovering the stolen property — "a bag of loot," as Horn described it — seemed irrational and vengeful rather than heroic. We agreed...