Although I do find it rather an indictment on American society that a delivery driver feels it neccessary to arm himself with a gun...
Both my brother and an ex-boyfriend of mine used to deliver for Pizza Hut in Brisbane, Australia and never needed a gun to do so (and before anyone points out the Australian gun laws, I might add this was prior to 1995 when those laws took effect!)
Brisbane, Australia did have a pretty low crime rate compared to many American inner cities.