A local option to ban guns was written as a boilerplate clause for the new law, which extends gun packing to hundreds of parks -- including public playgrounds, campgrounds, greenways and nature trails. Few state politicians anticipated there would be local resistance. But bans were voted by Nashville and Memphis and dozens of suburban counties and rural communities. The result is a crazy-quilt pattern of gun safety and risk that is prompting one county to ban student field trips and track meets to areas that did not opt to ban guns.