I'm no legal scholar, but it appears that in Louisiana, it is a crime if someone has a phobia about guns (as long as they call it *reasonable*) and you happen to be doing something otherwise legal that triggers their phobia.
For instance, about half the people that most folks know/come into contact with on a daily basis, are either irresponsible or below 100 IQ. So our man on the street, John Q. Public, sees someone he doesn't know with a firearm in a densely populated place. He figures that there is an even chance this guy is a yahoo who will be careless or stupid with that gun, or worse, a bad guy with bad intent on his mind. JQ Public is not going to risk his neck by checking it out in person - no, he will summon people who get paid to risk their necks for a living... the police. He will let THEM check it out.
Not defending that at all... just pointing out, that's the way it is in public company these days and whining about it or worse, diseregarding it, is not going to solve anything.
Sorry for your troubles, dude. Hope the charges get dropped.