Pepper spray does not work on everyone. ... Many people can also just fight through the effects of pepper spray (law enforcement is trained to do so). Pepper spray can be difficult to deploy in stressful and violent situations.

Is anyone immune to pepper spray?

You can build up a tolerance to pepper spray and in fact there is a percentage of the population which is not affected by pepper spray: MYTH! ... However, civilians have access to defense sprays with the same potency as carried by agencies using the strongest available formulations.

Is pepper spray actually useful?

Pepper spray is a defensive device, used to temporarily stop a threat and allow the user to escape physical harm from their assailant. It is unlawful for the user to use pepper spray for any other reason and could incur criminal and civil penalties if used for other purposes.