I've often heard the argument that banning guns is silly because a small machine shop can turn out submachine guns. With people like this guy in the world, the same could be said about your local Hobby Lobby or elementary school classroom.
Watch out, I hear that the BATFEIEIO is going to start considering possession of construction paper to be constructive possession.
If he did it with newspapers, he could build a case for First, Second and Fourth amendment protection. Talk about being secure in their persons, houses, papers, and effects!