Well, it depends. Pepper spray is not good indoors, as you too will suffer, among other things. It's also no good out in breezy conditions, and some people are immune to its effects. I do agree with having layers of defense.
Jim
I'm glad you brought this up. I was participating in a very long thread on pepper spray on another site that was very enlightening. Center stage to that thread was a man who worked in R&D for a pepper spray company, and through the sources, evidence and arguments he provided, it really cleared up a lot of the myths and misgivings about it for me.
First, no one is immune to it. Period. Not even a nutcase on PCP. The chemistry and inflammatory response of the eyes and nose are an innate part of mammal physiology. Yes, OC also causes pain, and certain people can tolerate that pain to various extents, but they cannot change their eye chemistry. They will still be blinded and have respiratory effects. The illusion of immunity is often due to be being used improperly, such as from too far away or in the case of the numerous LEO training videos, being fired at someone who is told exactly when it will be fired and with closed eyes. It's also problematic to draw conclusions from claims by police officers. Cops don't use OC like civilians do, because they are trying to capture the assailant, not get away. Further, police formulations a
weaker than OC in the civilian market, because they often need to go hands-on with the perp; the weaker spray lowers cross-contamination and speeds up decon.
Usage in breezy conditions or indoors is a concern (albeit exaggerated, after my own testing), but the OP is a pizza guy. He'll be outside and near buildings most of the time, not in an open meadow. Further, there are sprays that fire a stream of liquid that won't blow back.
I am not meaning to criticize; my concern is by perpetuating the myths and "concerns," we discourage people who could have been saved. I know several cases personally where if they had read this thread, and carried a knife with no pepper spray, they would have a) been assaulted, because they had no training on how to use a knife defensively, or would have not used it because the threat was not deadly, or b) would have killed or maimed their attacker and been charged with aggravated assault or murder themselves, because the level of force was not appropriate, while OC would have been legal.