As someone who's done this very type of thing (teaching school kids about American history, in period clothing, holding a musket), the thought that SWAT might be called by a well intentioned idiot is always in the back of my mind. You just expect that type of thing here, not in that part of Virginia.
http://www.timesnews.net/article/9044419/civil-war-re-enactor-causes-lockdown-at-schools
BRISTOL, Va. — A report of a man with a gun sent two school campuses into alert mode Tuesday morning, but the man turned out to be a Civil War re-enactor carrying a long rifle for a presentation...brought a long rifle to show the class and was probably seen leaving as he carried that rifle, police said. Both schools canceled their alerts and resumed normal operations.
http://www.timesnews.net/article/9044419/civil-war-re-enactor-causes-lockdown-at-schools
BRISTOL, Va. — A report of a man with a gun sent two school campuses into alert mode Tuesday morning, but the man turned out to be a Civil War re-enactor carrying a long rifle for a presentation...brought a long rifle to show the class and was probably seen leaving as he carried that rifle, police said. Both schools canceled their alerts and resumed normal operations.