What is the function of a gun?

[Nuclear Unicorn]

77. Rights aren't subject to precentages or wild speculation about being disarmed by ninja burglars.

The question becomes: If a person legitimately uses a gun to defend themselves but runs afoul of a gun control law, i.e. registration, permitting etc. what should be the penalty? If a stalker invaded a woman's home and she shot him with an unregistered gun how long should we, as a society, send her to prison?

I say she shouldn't serve a single minute of jail time. In fact, once the police conclude their investigation they should return her property and politely excuse themselves from her life.

Gun laws should not criminalize lawful behavior. They can/should be used to aggravate already unlawful behavior.

But even then gun laws will not stop annihilationist killers of the sort that sparked the current debate. They are immune to consequence by virtue of the fact they anticipate their own deaths in their actions. We can hope to intercept and treat them when they reveal their intentions, as they so often tend to do or we can stop them once they go into action but they are beyond prevention by criminal law.