That advice might work on a bratty little brother, but it turns out that huge piles of mail are impervious to snubs. Yesterday we were told to leave behind mountains of non-preferential mail so that we could help on other routes without using overtime. I had to invoke the "Pay me now, or pay me later" clause because as Chico Marx said, "There is no sanity clause."
Today, I had to work long after dark, but luckily I had a new ball cap with a light built in. Delivering mail in the dark used to be depressing but with the advent of LED's and lithium batteries not so much. It's so much easier to see, and if the light burns out, you can always eat the battery.