No, paintball gun cannot be used for non-lethal self-defense. In a nutshell, it is not a good option for self or home defense. I must drag your attention to a point that it needs some necessary items to operate such hopper, compressed air, etc. Assembling these parts and firing it immediately is difficult unless you have everything set for it. Thus, you cannot depend on a paintball gun for your security.
Can a paintball gun be used for self defense ?