Not only do they limit your 2A rights but endanger your family by allowing this type of peron to stay around I know he is on leave but can probably still have acess the park.
"Firearms stand next in importance to the Constitution itself. They are the American people's liberty teeth and keystone under independence ... From the hour the Pilgrims landed, to the present day, events, occurrences, and tendencies prove that to insure peace, security and happiness, the rifle and pistol are equally indispensable . . . the very atmosphere of firearms everywhere restrains evil interference - they deserve a place of honor with all that is good" (George Washington)