No lawyer, but I've been using pepper spray for a decade or more. You can kill someone with pepper spray if they have a respiration problem. It is not a toy.
I'd stop getting into argument's and don't look for excuses to gas people.
If you are attacked you can gas them. But if someone argues with you or even pushes you, why can't you walk away?
If the person has a weapon you can gas them. There is 'disparity of force,' but the law does not like using weapons on unarmed people in general.
If you go to other states be careful what pepper you carry. NJ and NY especially.

