Anyone read the statute at the site? I would go with #3 as my defense.
3. No offense is committed under this section by a person acting in good faith with the purpose to prevent harm.
“Your honor... I came well prepared to defend and protect other shoppers from any possible deranged mass shooters.” :)
No, that is not within the ordinary citizen's purview. You protect and defend yourself and your own. The 2nd Amndt calls others to protect themselves. If they happen to benefit from your own self-protection activity, ok; but if not, too bad. They have their own responsibility, and if choose not to exercise their 2Amdt rights, it's on them, not you.