Most people should be able to carry on vital functinos after havinf gbeen hit with the pepper spray. The reason it is so effective against MOST people is that the pain and shortness of breath tend to make them panic, and they lose their ability to fight back.
If a person is able to keep their wits about them they can continue to fight effectively. They will still have trouble seeing through watery eyes, and will still feel thee pain, but they can carry on. I know this from multiple experiences.
Still, I don't like the stuff and don't like to get caught in the spray.
I didn't do it, but I thought about it. Next time I might.