Dan Rodricks: Attention, bad guys — leave our postal carriers alone

One day soon, I should receive from the U.S. Postal Service the annual count of dog attacks inflicted on the nation’s hardworking, all-weather letter carriers. The number for the previous year comes out every spring, along with the perennial request that Americans be “responsible dog owners” by keeping their pets away from the men and women who deliver 162 million pieces of first-class mail each day.