A campaign to ban "night time" postal deliveries is misguided

In November, a postal worker was killed in Prince George's County while delivering mail in the evening ("U.S. Postal Service worker fatally shot in MD," ).  So according to today's tv news programs, the National Association of Postal Workers will be conducting a protest--it's Martin Luther King Jr. Day--to ban delivery of mail at night.

For one, a decrease in staff has led to more mail being delivered later--my mail is often delivered later in the day/early in the evening.

Second, such a reflexive ban isn't necessary because of all the places where crime isn't an issue.

Third, what about banning mail in the daytime?, because that's when most crimes against postal workers are perpetrated.  After all, there was a stabbing of a postal worker in Twinbrook in 2008, in the early afternoon ("Postal Worker Stabbed While Delivering Mail in Rockville," Washington Post).  (I understand this is a function of when most workers are working not so much the time they are working.)

Fourth, in areas of known criminal activity, from a risk management standpoint, it can make sense to limit mail delivery to day light.  Focus.