I completely agree that people have bad days and if they have a little bit of attitude or are a little rude that can be forgiven. I know the delivery people work hard, the UPS truck that comes by my house (almost everyday lately) has two delivery people on it to get the deliveries done faster I assume. I see them running around like madmen outside. However, no one should be tracked down at their workplace and laid into. No one. It was a passing dirty look while he delivered a package, it was deliberate and that is inexcusable in my opinion.