What are you suggesting in (II) ? that if she had a gun the would have left her alone? sorry but this is not how harrassing works. That if she had shot him she would have fixed the issue ? sorry but she would be in a very different world of issue if she shot him. Really I fail to see how a gun would be a solution or even help in this situation.

In (III) it seems that you really got lucky. Had those people been armed you'd probably be dead or severely injured, as you pointed out you stand no chance against 5 people firing at you. If you spooked them that's because they had no intent to harm you and you probably could have spooked them without the sound of a gun. BTW the gun was only a musical instrument and you could have played a recording of pumping a gun to the same result.

(IV) Really a bad analogy here. Using a fire extinguisher the way it is intended can only help prevent a situation becoming catastrophic, using a weapon for what is has been designed and the way it is intended can only end in an aggravated situation. Then the justifying something using a tautology is simply failing to justify it. What I gather from this is that you have a firm belief in guns and that there is no alternative, akin to religious belief.